US20160381220A1 - Personal Voice-Based Information Retrieval System - Google Patents

Abstract

The present invention relates to a system for retrieving information from a network such as the Internet. A user creates a user-defined record in a database that identifies an information source, such as a web site, containing information of interest to the user. This record identifies the location of the information source and also contains a recognition grammar based upon a speech command assigned by the user. Upon receiving the speech command from the user that is described within the recognition grammar, a network interface system accesses the information source and retrieves the information requested by the user.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS
• The present application is a continuation of U.S. Utility application Ser. No. 12/787,801, filed May 26, 2010, which is a continuation of U.S. Utility application Ser. No. 11/711,773, filed Jun. 29, 2007, which is a continuation of U.S. Utility application Ser. No. 09/777,406, dated Feb. 6, 2001, which claims priority to U.S. Provisional Patent Application No. 60/180,343, filed Feb. 4, 2000, which are incorporated by reference herein in their entirety.
FIELD OF THE INVENTION
• The present invention relates generally to the field of providing information IO access. In particular, the invention relates to a personalized system for accessing information from the Internet or other information sources using speech commands.
BACKGROUND OF THE INVENTION
• Popular methods of information access and retrieval using the Internet or other computer networks can be time-consuming and complicated. A user must frequently wade through vast amounts of information provided by an information source or web site in order obtain a small amount of relevant information. This can be time-consuming, frustrating, and, depending on the access method, costly. A user is required to continuously identify reliable sources of information and, if these information sources are used frequently, repeatedly access these sources.
• Current methods of accessing information stored on computer networks, such as Wide Area Networks (WANs), Local Area Network (LANs) or the Internet, require a user to have access to a computer While computers are becoming increasingly smaller and easier to transport, using a computer to access information is still more difficult than simply using a telephone. Since speech recognition systems allow a user to convert his voice into a computer-usable message, telephone access to digital information is becoming more and more feasible Voice recognition technology is growing in its ability to allow users to use a wide vocabulary.
• Therefore, a need exists for an information access and retrieval system and method that allows users to access frequently needed information from information sources on networks by using a telephone and simple speech commands.
SUMMARY OF THE INVENTION
• One object of the preferred embodiment of the present invention is to allow users to customize a voice browsing system.
• A further object of the preferred embodiment is to allow users to customize the information retrieved from the Internet or other computer networks and accessed by speech commands over telephones.
• Another object of the preferred embodiment is to provide a secure and reliable retrieval of information over the Internet or other computer networks using predefined verbal commands assigned by a user.
• The present invention provides a solution to these and other problems by providing a new system for retrieving information from a network such as the Internet. A user creates a user-defined record in a database that identifies an information source, such as a web site, containing information of interest to the user. This record identifies the location of the information source and also contains a recognition grammar assigned by the user. Upon receiving a speech command from the user that is described in the assigned recognition grammar, a network interface system accesses the information source and retrieves the information requested by the user.
• In accordance with the preferred embodiment of the present invention, a customized, voice-activated information access system is provided. A user creates a descriptor file defining specific information found on a web site the user would like to access in the future. The user then assigns a pronounceable name or identifier to the selected content and this pronounceable name is saved in a user-defined database record as a recognition grammar along with the URL of the selected web site.
• In the preferred embodiment, when a user wishes to retrieve the previously defined web-based information, a telephone call is placed to a media server. The user provides speech commands to the media server that are described in the recognition grammar assigned to the desired search. Based upon the recognition grammar, the media server retrieves the user-defined record from a database and passes the information to a web browsing server which retrieves the information from associated web site. The retrieved information is then transmitted to the user using a speech synthesis software engine.
BRIEF DESCRIPTION OF THE DRAWINGS
• FIG. 1 displays a personal information selection system used with the preferred embodiment of the present invention;
• FIG. 2 displays a web page displayed by the clipping client of the preferred embodiment;
• FIG. 3 is a block diagram of a voice browsing system used with preferred embodiment of the present invention;
• FIG. 4 is a block diagram of a user-defined database record created by preferred embodiment of the present invention;
• FIG. 5 is a block diagram of a media server used by the preferred embodiment; and
• FIG. 6 is a block diagram of a web browsing server used by the preferred embodiment.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
• The present invention uses various forms of signal and data transmission to allow a user to retrieve customized information from a network using speech communication. In the preferred embodiment of the present invention, a user associates information of interest found on a specific information source, such as a web site, with a pronounceable name or identification word. This pronounceable name/identification word forms a recognition grammar in the preferred embodiment. When the user wishes to retrieve the selected information, he may use a telephone or other voice enabled device to access a voice browser system. The user then speaks a command described in the recognition grammar associated with the desired information. The voice browsing system then accesses the associated information source and returns to the user, using a voice synthesizer, the requested information.
• Referring toFIG. 1, auser100 uses a computer102 to access a network, such as a WAN, LAN, or the Internet, containing various information sources [n the preferred embodiment, theuser100 access the Internet104 and begins searching forweb sites106, which are information sources that contain information of interest to the user. When theuser100 identifies aweb site106 containing information the user would like to access using only a voice enabled device, such as a telephone, and thevoice browsing system108, the user initiates a “clipping client” engine110 on his computer102.
• The clipping client110 allows auser100 to create a set of instructions for use by thevoice browsing system108 in order to report personalized information back to the user upon request. The instruction set is created by “clipping” information from the identified web site. Auser100 may be interested in weather for a specific city, such as Chicago. Theuser100 identifies a web site from which he would like to obtain the latest Chicago weather information. The clipping client110 is then activated by theuser100.
• The clipping client110 displays the selected web site in the same manner as a conventional web browser such as Microsoft's® Internet Explorer.FIG. 2 depicts a sample of aweb page200 displayed by the clipping client110. Theuser100 begins creation of the instruction set for retrieving information from the identified web site by selecting the uniform resource locator (URL)address202 for the web site (i.e., the website address). In the preferred embodiment, this selection is done by highlighting and copying theURL address202. Next, the user selects the information from the displayed web page that he would like to have retrieved when a request is made. Referring toFIG. 2, the user would select the information regarding the weather conditions in Chicago204. Theweb page200 may also contain additional information such asadvertisements206 or links toother web sites208 which are not of interest to the user. The clipping client110 allows the user to select only that portion of the web page containing information of interest to the user. Therefore, unless theadvertisements206 andlinks208 displayed on the web page are of interest to the user, he would not select this information. Based on theweb page information204 selected by the user, the clipping client110 creates a content descriptor file containing a description of the content of the selected web page. This content descriptor file indicates where the information selected by the user is located on the web page. In the preferred embodiment, the content descriptor file is stored within theweb browsing server302 shown inFIG. 3. Theweb browsing server302 will be discussed below.
• Table 1 below is an example of a content descriptor file created by the clipping client of the preferred embodiment. This content descriptor file relates to obtaining weather information from the web site www.cnn.com.

• TABLE 1
  table name : portalServices
  column :
  service
  content:
  weather
  column:
  config
  content:
  [cnn]
  Input=_zip
  URL=http://cgi.cnn.com/cgi-bin/weather/redirect?zip= zip
  Pre-filter=″\n″ ″
  Pre-filter = ″ < [ ″ <: > ] + > ″ ″
  Pre-filter= s+/I
  Pre-filter=″ [ \ ( \) \ I ] ″ ! ″
  Output=_location
  Output=first_day_name
  Output=first_day_weather
  Output=first_day_high_F
  Output=first_day_high_C
  Output=first_day_low_F
  Output=first_day_low_c
  Output=second_day_name
  Output=second_day_weather
  Output=second_day_high_F
  Output=second_day_high_C
  Output=second_day_low_F
  Output=second_day_low_C
  Output=third_day_name
  Output=third_day_weather
  Output=third_day_high_F
  Output=third_day_high_C
  Output=third_day_low_F
  Output=third_day_low_C
  Output=fourth_day_name
  Output=fourth_day_weather
  Output=fourth_day_high_F
  Output=fourth_day_high_C
  Output=fourth_day_low_F
  Output=fourth_day_low_C
  Output=undef
  Output=_current_time
  Output=fourth_day_low_C
  Output=undef
  Output=_current_time
  Output=_current_month
  Output=_current_day
  Output=_current_weather
  Output=_current_temperature_F
  Output=_current_temperature_C
  Output=_humidity
  Output=_wind
  Output=_pressure
  Output=_sunrise
  Output=_sunset
  Regular_expression=WEB SERVICES:
  (.+) Forecast FOUR-DAY FORECAST (\S+)(\S+) HI
  GH (\S+) F (\S+) C LOW (\S+) F (\S+) C (\S+) (\S+)
  HIGH (\S+) F (\S+) C LOW (\S+
  ) F (\S+) C (\S+) (\S+) HIGH (\S+) F (\S+) C LOW (\S+) F
  (\S+) C (\S+) (\S+)
  HIG
  H−(\S+) C LOW (\S+) F (\S+) C WEATHER MAPS RADAR ( .+)
  Forecast
  CURRENT C
  ONDITIONS(.+) !local!, (\S+) (\S+) (.+) Temp: (\S+) F,
  (\S+) C Rel.
  Humidity: (
  \S+) Wind: (.+) Pressure: ( .+) Sunrise: ( .+) Sunset: (.+)

• Finally, the clipping client110 prompts the user to enter an identification word or phrase that will be associated with the identified web site and information. For example, the user could associate the phrase “Chicago weather” with the selectedURL202 andrelated weather information204. The identification word or phrase is stored as a personal recognition grammar that can now be recognized by a speech recognition engine of thevoice browsing system108 which will be discussed below. The personal recognition grammar,URL address202, and a command for executing a content extraction agent are stored within a database used by thevoice browser system108 which will be discussed below.
• Thevoice browsing system108 used with the preferred embodiment will now be described in relation toFIG. 3. Adatabase300 designed by Webley Systems Incorporated is connected to one or moreweb browsing servers302 as well as to one ormore media servers304. The database may store information on magnetic media, such as a hard disk drive, or it may store information via other widely acceptable methods for storing data, such as optical disks. Themedia servers304 function as user interface systems that provide access to thevoice browsing system108 from a user's voice enabled device306 (i.e., any type of wireline or wireless telephone, Internet Protocol (IP) phones, or other special wireless units). Thedatabase300 contains a section that stores the personal recognition grammars and related web site information generated by the clipping client110. A separate record exists for each web site defined by the user. An example of a user-defined web site record is shown inFIG. 4. Each user-defined web site record400 contains therecognition grammar402 assigned by the user, the associated Uniform Resource Locator (URL)404, and a command that enables the “content extraction agent”406 and retrieves the appropriate content descriptor file required to generate proper requests to the web site and to properly format received data. The web-site record400 also contains thetimestamp408 indicating the last time the web site was accessed. The content exaction agent is described in more detail below.
• Thedatabase300 may also contain a listing of pre-recorded audio files used to create concatenated phrases and sentences. Further,database300 may contain customer profile information, system activity reports, and any other data or software servers necessary for the testing or administration of thevoice browsing system108.
• The operation of themedia servers304 will now be discussed in relation toFIG. 5. Themedia servers304 function as user interface systems since they allow a user to access thevoice browsing system108 via a voice enableddevice306. In the preferred embodiment, themedia servers304 contain aspeech recognition engine500, a speech synthesis engine502, an Interactive Voice Response (IVR)application504, acall processing system506, and telephony andvoice hardware508 that is required to enable thevoice browsing system108 to communicate with the Public Switched Telephone Network (PSTN)308. In the preferred embodiment, each media server is based upon Intel's Dual Pentium III 730 MHz microprocessor system.
• The speech recognition function is performed by aspeech recognition engine500 that converts voice commands received from the user's voice enabled device10 (i.e., any type of wire line or wireless telephone, Internet Protocol (IP) phones, or other special wireless units) into data messages. In the preferred embodiment voice commands and audio messages are transmitted using thePSTN308 and data is transmitted using the TCP/IP communications protocol. However, one skilled in the art would recognize that other transmission protocols may be used. Other possible transmission protocols would include SIP/VoIP (Session Initiation Protocol/Voice over IP), Asynchronous Transfer Mode (ATM) and Frame Relay. A preferred speech recognition engine is developed by Nuance Communications of 1380 Willow Road, Menlo Park, Calif. 94025 (www nuance.com) The Nuance engine capacity is measured in recognition units based on CPU type as defined in the vendor specification The natural speech recognition grammars (i.e., what a user can say that will be recognized by the speech recognition engine) were developed by Webley Systems.
• In the preferred embodiment, when a user access thevoice browsing system108, he will be prompted if he would like to use his “user-defined searches.” If the user answers affirmatively, themedia servers304 will retrieve from thedatabase300 thepersonal recognition grammars402 defined by the user while using the clipping client10.
• Themedia servers304 also contain a speech synthesis engine502 that converts the data retrieved by theweb browsing servers302 into audio messages that are transmitted to the user's voice enableddevice306. A preferred speech synthesis engine is developed by Lernout and Hauspie Speech Products, 52 Third Avenue, Burlington, Mass. 01803 (www.lhslcom).
• A further description of theweb browsing server302 will be provided in relation toFIG. 6. Theweb browsing servers302 provide access to data stored on any computer network including theInternet104, WANs or LANs. Theweb browsing servers302 receive responses fromweb sites106 and extract the data requested by the user. This task is known as “content extraction.” Theweb browsing server302 is comprised of acontent extraction agent600, acontent fetcher602, and thecontent descriptor file604. Each of these are software applications and will be discussed below.
• Upon receiving a user-defined web site record400 from thedatabase300 in response to a user request, theweb browsing server302 invokes the “content extraction agent”command406 contained in the record400. Thecontent extraction agent600 retrieves the content descriptor file604 associated with the user-defined record400. As mentioned, the content descriptor file604 directs the extraction agent where to extract data from the accessed web page and how to format a response to the user utilizing that data. For example, the content descriptor file604 for a web page providing weather information would indicate where to insert the “city” name or ZIP code in order to retrieve Chicago weather information. Additionally, the content descriptor file604 for each supported URL indicates the location on the web page where the response information is provided. Theextraction agent600 uses this information to properly extract from the web page the information requested by the user.
• Thecontent extraction agent600 can also parse the content of a web page in which the user-desired information has changed location or format. This is accomplished based on the characteristic that most hypertext documents include named objects like tables, buttons, and forms that contain textual content of interest to a user. When changes to a web page occur, a named object may be moved within a document, but it still exists. Therefore, thecontent extraction agent600 simply searches for the relevant name of desired object. In this way, the information requested by the user may still be found and reported regardless of changes that have occurred.
• Table 2 below contains source code for acontent extraction agent600 used by the preferred embodiment.

• TABLE 2
  # ! /usr/ local/www/bin/sybperl5
  #$Header:
  /usr/local/cvsroot/webley/agents/service/web_dispatch.pl,v
  1.6
  # Dispatches all web requests
  #http://wcorp.itn.net/cgi/flstat?carrier=ua&flight_no=155&m
  cn_abbr=jul&date=
  6&stamp=ChLN~PdbuuE*itn/ord,itn/cb/sprint_hd
  #http://cig.cnnfn.cm/flightview/rlm?airline=amt&number=300
  require ″config_tmp.pl″;
  # check parameters
  die ″Usage: $0 service [params]\n″ if $#ARGV < 1;
  #print STDERR @ARGV;
  # get parameters
  my ( $service, @param ) = @ARGV;
  # check service
  My ($services = (
  weather_cnn => ‘webget.pl weather_cnn’,
  weather_lycos => ‘webget.pl
  ‘weather_lycos’,
  weather_weather => ‘webget.pl
  weather_weather’,
  weather_snap => ′webget.pl
  weather_snap’,
  weather_infospace => ‘webget.pl
  weather_infospace’,
  stockQuote_yahoo => ′webget.pl stock′,
  flightStatus_itn => ′webget.pl
  flight_delay’,
  yellowPages_yahoo => ′yp_data.pl′,
  yellowPages_yahoo => ′yp data.pl′,
  newsHeaders_newsreal => ′news.pl′,
  newsArticle_newsreal => ′news.pl′,
  ) ;
  #test param
  my $date= ′date′;
  chop ( $date );
  my ( $short_date ) =$date = ~ / \s+({w3}\s+\d{1, 2}) \s+/;
  my % Test = (
  weather_cnn => ′60053′,
  weather_lycos => ′60053′,
  weather_weather => ′60053′,
  weather_snap => ′60053′,
  weather_infospace => ′60053′,
  stockQuote_yahoo => ′msft′,
  flightStatus_itn => ′ua 155 ′ .
  $short_date,
  yellowPages_yahoo => ′tires 60015′,
  newsHeaders_newsreal => ′ 1 ′,
  newsArticle_newsreal => ′1 1′ ,
  ) ;
  die ″date: $0: error: no such service: $service (check
  this script) \n″
  unless $Services{ $service };
  # prepare absolute path to run other scripts
  my ( $path, $script ) = $0 =~ ml{circumflex over ( )} (.*/) ([ {circumflex over ( )} / ] * ) | ;
  # store the service to compare against datatable
  my $service_stored = $service;
  # run service
  While ( ! ( $response = ′$path$Services { $service }@param’ )
  ) (
  # response failed
  # check with test parameters
  $ response = ′$path$Services { $service }$Test{
  $service }”,
  If ( response ) {
  $service = &switch_service ( $service ) ;
  #  print “wrong paramnet values were supplied;
  $service -
  @param\n″;
  #  die ″$date: $0: error: wrong parameters: $service
  -
  @param\n″;
  }
  else {
  # change priority and notify
  $service = &increase_attempt ( $service ) ;
  }
  }
  # output the response
  print $response;
  sub increase attempt {
  my ( $service ) = @_;
  my ( $service_name) split( /_/, $service ) ;
  print STDERR ″$date: $0: attn: changing priority for
  service:
  $service\n″;
  # update priority
  &db_query ( ″update mcServiceRoute ″
  .″set priority = ( select max ( priority
  ) from
  mcServiceRoute ″
  . ″where service = ′$service name′ ) + 1,
  . ″date = getdate ( ), ″
  . ″attempt = attempt + 1 ″
  . ″where route = ′$script $service′ ″ ) ;
  #  print ″---$route===\n″;
  # find new route
  my $route @{ &db_query( ″select route from
  mcServiceRoute ″
  .″where service =
  ′$service_name′ ″
  .″and attempt < 5
  ″
  . ″order by
  priority ″)
  } -> [ 0 ] { route };
  &db_query( ″update mcServiceRoute ″
  . ″set attempt = 0 ″
  . ″where route = ‘$script $service’ “ ) ;
  if( $route eq ″$script $service stored” ) ;
  ( $service_name, $service ) =split (/\s+/, $route ) ;
  die ″$date: $0: error: no route for the service:
  $service (add
  More) \n”″
  unless $service;
  return $service;
  }
  sub switch service {
  my ( $service ) = @_;
  my ( $service_name) = split (/_/, $service );
  print STDERR ″$date: $0: attn: changing priority for
  service:
  $service\n″;
  # update priority
  &db_query ( ″update mcServiceRoute ″
  . ″set priority = ( select max ( priority for
  ) from
  mcServiceRoute ″
  . ″where service = ′$service_name′ ) +1,
  . ″date ~ getdate ( ) ″
  . ″where route = ′$script $service′ ″ ) ;
  #   print ″---$route===\n″;
  -  # find new route
  my $route = @( &db_query ( “select route from
  mcServiceRoute ″
  .″where service =
  ′$service_name′ ″
  . ″and attempt < 5
  ″
  . ″order by
  priority ″)
  } -> [ 0 ] { route };
  die ″ $ date : $ 0 : error : there is the only one service:
  $route (add
  more) \n″
  if( $route eq ″$script $service″
  or $route eq ″$script $service_stored″ ) ;
  (service_name, $service ) = split (/ \s+/, $route ) ;
  die ″$date: $0: error: no route for the service:
  $service (add
  more)\n″
  unless $service;
  return $service;
  }

  
  Table 3 below contains source code of thecontent fetcher602 used with thecontent extraction agent600 to retrieve information from a web site

• TABLE 3
  !/usr/local/www/bin/sybper15
  # -T
  # -w
  # $Header:
  /usr/local/cvsroot/webley/agents/service/webget. pl, v 1.4
  # Agent to get info from the web.
  # Parameters: service_name [service_parameters], i.e. stock
  msft or weather
  60645
  # Configuration stored in files service_name.ini
  # if this file is absent the configuration is received from
  mcServices table
  # This script provides autoupdate to datatable if the .ini
  file is newer.
  $debug = 1;
  use URI : : URL;
  use LWP : : UserAgent;
  use HTTP : :Request: : Common;
  use Vail : :VarList;
  use Sybase : : CT lib;
  use HTTP: :Cookies;
  # print ″Sybase: :CT lib $DB_USR, $DB_PWD, $DB SRV;″;
  Open ( STDERR, ″>>$0.log″ ) if $debug;
  #open ( STDERR, ″>&STDOUT″ ) ;
  $log = ′date’;
  #$response = ‘.url.pl
  http://cgi.cnn.com/cgi-bin/weather/redirect?zip=60605”;
  #$response= ‘pwd′;
  #print STDERR ″pwd = $response\n″;
  #$response = ‘ls’ ;
  #print STDERR ″ls = $response\n″;
  chop ( $log ) ;
  $log .= ″pwd=″ . ‘pwd’ ;
  chop ( $log ) ;
  #$debug2 = 1;
  my $service = shift;
  $log .= ″ $service: ″. join( ′ : ′, @ARGV ) . ″\n″;
  print STDERR $log if $debug;
  #$response = ·. /url .pl
  ″http://cgi.cnn.com/cgi-bin/weather/redirect?zip=60605” ;
  my @ini = &read_ini ( $service ) ;
  chop ( @ ini ) ;
  my $section= ″ ″;
  do ($section = &process_section( $section ) } while
  $section;
  #$response = ‘ ./url.pl
  http://cgi.cnn.com/cgi-bin.weather/redirect?zip=60605” ’ ;
  exit;
  #######################################################
  sub read_ini {
  my ( $service ) = @_;
  my @ini = ( );
  # first, try to read file
  $0 =~ ml{circumflex over ( )} ( .*/) [{circumflex over ( )}/];
  $service = $1 . $service;
  if ( open( INI, ″$service.ini″ ) ) {
  @ini = ( < INI > ) ;
  return @ini unless ( $DB_SRV ) ;
  # update datatable
  my $file_time = time - int ( ( -M ″$service. ini″ )
  * 24 *
  3600 ) ;
  #  print ″time $file_time\n″;
  my $dbh = new Sybase: :CTlib $DB_USR, $DB_PWD,
  $DB_DRV;
  unless ( $dbh) {
  print STDERR ″webget.pl: Cannot connect to
  dataserver $DB_SRV:$DB_USR:$DB_PWD\n″;
  return @ini;
  }
  my @row_refs = $dbh->ct_sql ( ″select lastUpdate
  from
  mcServices where service = ‘$service′ ″, undef, 1);
  if ($dbh -> {RC } == CS_FAIL) {
  print STDERR ″webget.pl: DB select from
  mcServices
  failed\n”;
  return @ini;
  }
  unless ( defined @row_refs ) {
  # have to insert
  my ( @ini_escaped ) = map {
  ( my $x = $_) =~ s/ \ ‘ / \ ‘ /g;
  $x;
  }@ini;
  $dbh ->ct_sql ( ″insert mcServices values (
  ′$service′,
  ′@ini_escaped′, $file time; ) ″);
  if( $dbh -> { RC } = = CS_FAIL)
  print STDERR ″webget.pl: DB insert to
  mcServic:es failed\n″;
  }
  return @ ini;
  #  print ″time $file_time:”$row_refs [ 0 ] -> {
  ‘lastUpdate’
  }.”\n”;
  If ( $file_time -> ref_refs [0 ] -> { ‘last update’
  } ) {
  # have to update
  my ( @ini_escaped = map {
  ( my $x = $_ ) =~ s/ \ ‘ / \ ‘ \ ‘ / g;
  $x;
  } @ini;
  $dbh -> ct_sql ( ″update mcServices set config
  =
  ′@ini_escaped′, lastUpdate = $file_time where service =
  ′$service′ ″ );
  if( $dbh -> { RC } − CS_FAIL) {
  print STDERR ″webget.pl: DB update to
  mcServices failed\n″;
  }
  }
  return @ini;
  }
  else {
  print STDERR ″$0: WARNING: $service.ini n/a in ″
  . − ‘pwd’
  . ″Try to read DB\n″;
  }
  # then try to read datable
  die ″webget.pl: Unable to find service $service\n″
  unless ( $DB_SRV
  ) ;
  my $dbh = new Sybase: : CTlib $DB_USR, $DB_PWD, $DB_SRV;
  die ″webget.pl: Cannot connect to dataserver
  $DB SRV: $08 USR: $08 PWD\n″ unless ( $dbh ) ;
  my @row_refs = $dbh-> ct_sql ( ″″;;elect con.fiJ from
  mcServices where
  service = ′$service′ “ , undef, 1);
  die ″webget.pl: DB select from mcServices failed\n″ if
  $dbh -> { RC }
  = = CS FAIL;
  die ″webget.pl: Unable to find service $service\n″
  unless ( defined
  @row_refs ) ;
  $row_refs [ 0 ] -> { ′config′ } =~ s/\n /\n\r/g;
  @ini = split ( r/, $row_refs [ 0 ] ->{ ′config′ } ) ;
  return @ini;
  ###################################################################
  sub process_section {
  my ($prev_section ) = @_ ;
  my ($section, $output, $content );
  my %PAram;
  my %Content;
  # print″ ################################\n”;
  foreach (@ini ) {
  print;
  chop;
  s s+$//;
  s/{circumflex over ( )}\[(.*) \ ] ) {
  # get section name
  if ( /{circumflex over ( )}\ [(.*) \ ] ) {
  #  print ″$_: $section:$prev_section\n″;
  last if $section;
  next if $1 eq ″print″;
  #  next if $prev_section ne ″ ″ and
  $prev_section ne $1;
  if ($prev_section eq $1 )
  $prev_section = “ “;
  next;
  }
  $section = $1;
  }
  # get parameters
  Push ( @{ $Param{ $1 } }, $2 ) if $section and
  / ( [ {circumflex over ( )} = ] +) = (.*) /;
  - }
  # print″++++++++++++++++++++++++++++++++++\n″;
  return 0 unless $section;
  # print ″section $section\n″;
  # substitute parameters with values
  map { $Param{ URL }->[ 0 ]=~ s/$Param{ Input }->[ $_
  ] /$ARGV [ $_
  ] /g
  }0 . . S# { $Param { Input } };
  # get page content
  ( $Content{={ ′TIME′ }, $content ) = get_url_content (
  $ { $ Param { URL
  } } [ 0 ] ) ;
  # filter it
  map {
  if (/\″([″\″]+\″([″\″]*)\″/or
  /\/([″ ]+)\/([″\/]*)\//)
  (
  my $out = $2; $content =~ s/$1/$out/g;
  }
  } @ ($Param{ ″Pre-filter″} };
  #print STDERR $content;
  # do main regular expression
  unless ( @values = $content =~ / $! Param {
  Regular expression } } [ 0
  } / ) (
  &die_hard ( $ { $Param(Reqular_expression } } [ 0
  ], $content
  ) ;
  return $section;
  }
  %Content = map { ( $Param{ Output }->[ $_], $values [
  $_ ] )
  } 0. . $ # ( $Param { Output } ) ;
  # filter it
  map {
  if( / ( [{circumflex over ( )}\”]+)\″] +) \″ ( [″\″]+) \″ ( [″\″]*) \″/
  or / ( [{circumflex over ( )}\/]+) \/ ( [{circumflex over ( )}\/] +) \/ ([{circumflex over ( )}\/]*) \/ / ) (
  my $out = $3;
  $Content{ $1 } =~ s/$2out/g;
  }
  } @{ $Param { “Post-fileter” } };
  #calculate it
  map
  # calculate it
  map {
  if ( /([′′′=]+)=(.*)/
  my $eval = $2;
  map { $eval =~ s/$_/$Content( $_ }/g
  } keys %Content;
  $Content{ $1 } = eval( $eval ) ;
  }
  } @{ ( $ Param{ Calculate } } ;
  # read section [print]
  foreach $i ( 0 .. S#ini ) {
  next unless $ini [ $i] /{circumflex over ( )}\ [print\]/;
  foreach ( $i + 1 . . $#ini ) {
  last if $ini [ $_ ] =~ /{circumflex over ( )}\ [.+\]/;
  $output .= $ini [$_1] . ″\n″;
  }
  last;
  }
  # prepare output
  map { $output =~ s/$_/$Content{ $_ }/g
  } keys %Content;
  print $output;
  return 0;
  }
  ###########################################################################
  sub get_url_content [
  my ( $url ) = @_;
  print STDERR $url if $debug;
  $response = ‘ ./url.pl ′$url′ ;
  $response = ‘ ./url.pl ′$url′ ;
  Return ( $time - time, $response );
  my $ua = LWP: :UserAgent -> new;
  $ua ->agent ( ′Mozilla/4.0 [en] (Xll; I; FreeBSD 2.2.8-
  STABLE i386)′
  ) ;
  # $ua -> proxy( [′http′, ′https′],
  ′http://proxy.webley:3128/′ ) ;
  # $ua -> no_proxy (′webley′, ′vail′ );
  my $cookie = HTTP: :Cookies -> new;
  $ua -> cookie_jar ( $cookie ) ;
  $url = url $url;
  print ″$url\n″ if $debug2;
  my $time = time;
  my $res= $ua -> request ( GET $url ) ;
  print ″Response: ″ . ( time - $time) . ″sec\n″ if
  $debug2;
  Return ( $time - time, $res -> content) ;
  }
  ###########################################################################
  sub die hard {
  my ( $re, $content ) = @_ ;
  - my ( $re_end, $pattern );
  while ( $content ! ~ /$re/ ) {
  if ($re =~ s/ (\({{circumflex over ( )}\(\) ]+\) [{circumflex over ( )}(\)*$) / / ) {
  $re_end = $1 . $re_end;
  }
  else }
  $re_end = $re;
  last;
  }
  }
  $content=~ /$re/;
  $re/n
  Possible misuse:
  $re_end: \n
  Matched:
  $&\n
  Mismatched:
  $’\n
  ″ if $debug;
  if ( $debug ) {
  print STDERR ″Content:\n $content\n″ unless
  $′;
  }
  }
  ###########################################################################

• Once theweb browsing server302 accesses the web site specified in theCRL404 and retrieves the requested information, it is forwarded to themedia server304. The media server uses the speech synthesis engine502 to create an audio message that is then transmitted to the user's voice enableddevice306. In the preferred embodiment, each web browsing server is based upon Intel's Dual Pentium III 730 MHz microprocessor system.
• Referring toFIG. 3, the operation of the personal voice-based information retrieval system will be described. A user establishes a connection between his voice enableddevice306 and amedia server304 of thevoice browsing system108. This may be done using the Public Switched Telephone Network (PSTN)308 by calling a telephone number associated with thevoice browsing system108. Once the connection is established, themedia server304 initiates an interactive voice response (IVR) application. The IVR application plays audio message to the user presenting a list of 10 options, which includes “perform a user-defined search.” The user selects the option to perform a user-defined search by speaking the name of the option into the voice enableddevice306.
• Themedia server304 then accesses thedatabase300 and retrieves thepersonal recognition grammars402. Using the speech synthesis engine502, themedia server304 then asks the user, “Which of the following user-defined searches would you like to perform” and reads to the user the identification name, provided by therecognition grammar402, of each user-defined search. The user selects the desired search by speaking the appropriate speech command or pronounceable name described within therecognition grammar402. Thesespeech recognition grammars402 define the speech commands or pronounceable names spoken by a user in order to perform a user-defined search. If the user has a multitude of user-defined searches, he may speak the command or pronounceable name described in therecognition grammar402 associated with the desired search at anytime without waiting for themedia server304 to list all available user-defined searches. This feature is commonly referred to as a “barge-in” feature. Themedia server304 uses thespeech recognition engine500 to interpret the speech commands received from the user. Based upon these commands, themedia server304 retrieves the appropriate user-defined web site record400 from thedatabase300. This record is then transmitted to aweb browsing server302. Afirewall310 may be provided that separates theweb browsing server302 from thedatabase300 andmedia server304. The firewall provides protection to the media server and database by preventing unauthorized access in the event thefirewall312 for the web browsing server fails or is compromised. Any type of firewall protection technique commonly known to one skilled in the art could be used, including packet filter, proxy server, application gateway, or circuit-level gateway techniques.
• Theweb browsing server302 accesses theweb site106 specified by theURL404 in the user-defined web site record400 and retrieves the user-defined information from that site using the content extraction agent and specified content descriptor file specified in the contentextraction agent command406. Since theweb browsing server302 uses the URL and retrieves new information from the Internet each time a request is made, the requested information is always updated.
• The content information received from the respondingweb site106 is then processed by theweb browsing server302 according to the associated content descriptor file This processed response is then transmitted to themedia server304 for conversion into audio messages using either the speech synthesis engine502 or selecting among a database of prerecorded voice responses contained within thedatabase300.
• It should be noted that the web sites accessible by the personal information retrieval system and voice browser of the preferred embodiment may use any type of mark-up language, including Extensible Markup Language (XML), Wireless Markup Language (WML), Handheld Device Markup Language (HDML), Hyper Text Markup Language (HTML), or any variation of these languages.
• The descriptions of the preferred embodiments described above are set forth for illustrative purposes and are not intended to limit the present invention in any manner. Equivalent approaches are intended to be included within the scope of the present invention. While the present invention has been described with reference to the particular embodiments illustrated, those skilled in the art will recognize that many changes and variations may be made thereto without departing from the spirit and scope of the present invention. These embodiments and obvious variations thereof are contemplated as falling within the scope and spirit of the claimed invention.

Claims (1)

1. A method for retrieving information by a voice-browsing system, from an information source over a network, said method comprising steps of:

receiving a speech command from a user provided via an electronic communication device, by a speech-recognition engine coupled to a media server, the media server configured to identify and access the information source via the network, the speech-recognition engine adapted to select speech-recognition grammar established to correspond to the speech commands received from the user and assigned to a desired search;

selecting, by the media server, at least one appropriate information source retrieval instruction corresponding to the speech-recognition grammar established for a particular speech command, the at least one appropriate information-source-retrieval instruction stored in a database associated with the media server and adapted to retrieve information;

accessing, by a web browsing server, a portion of the information source to retrieve information of interest requested by the user, by selecting the information of interest from the information source and retrieving only the portion of the information according to the at least one appropriate information source retrieval instruction described, the information source periodically updated with current information;

converting the information retrieved from the information source into an audio message by a speech-synthesis engine, the speech-synthesis engine coupled to the media server; and

transmitting the audio message to the electronic-communication device for a particular user requesting information of interest to the user.

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