US20030122676A1 - Baby monitor and method for monitoring sounds and selectively controlling audio devices - Google Patents

Abstract

The present invention discloses a baby monitor system that incorporates into a receiver of the baby monitor circuitry that can remotely control an electric or electronic device when the output sound level of the receiver reaches a reference level. The control can be by infrared, radio frequency or hardwire transmission of a volume control command to the electric or electronic device. By incorporating this control system into the baby monitor, a parent is ensured to hear sounds of a baby.

Description

BACKGROUND OF THE INVENTION
• 1. Field of the Invention[0001]
• The present invention relates to a baby monitor, and more particularly to a baby monitor capable of controlling other devices. The baby monitor is capable of muting a television or other electronic device.[0002]
• 2. Description of the Related Art[0003]
• Baby monitors are well known. A standard baby monitor consists of a transmitter and a receiver, each of which can be powered by a battery or an A/C current source (usually with an inline transformer). The transmitter contains a microphone or other sound detecting device and is placed in a location near a baby. The receiver contains a speaker and placed in a location near a parent. A sound (e.g. a stirring or crying baby) detected by the transmitter is transmitted to the receiver for output to the parent to hear and respond to accordingly.[0004]
• Several versions of this standard model exist. One includes a plurality of light emitting diodes (LEDs), which light in series to indicate the level of the sound received by the receiver. This acts as a visual alert for the parent in that as the sound level increases the number of LEDs that light also increases. As an added alert the color of the subsequently lit or higher sound-level LEDs is a different color from the lower sound-level LEDs (usually red and green, respectively). This visual alert is useful in an environment where there are other noises that may cause the receiver output to go unheard by the parent. These other noises can be sound from a television, radio, stereo, or other electronic device, that outputs the sound from a speaker. These external noises can also be from noise-making electric appliances, for example, an electric mixer, a blender, a washing machine, or the like.[0005]
• In either of the above models, if the external noises are greater that the output of the baby monitor receiver, the sounds of the baby can go unheard by the parent. And a problem with the LED model in particular arises when external noises are present and the receiver is out of the line-of-sight of the parent. In this case, along with the sound going unheard, the visual alert goes unseen. Thus, in either case the baby could be crying and the parent would be unaware of this potentially dangerous situation.[0006]
• The present invention solves this long-standing problem and provides a baby monitor that can insure that the parent hears the sounds under a variety of external noise conditions.[0007]
SUMMARY OF THE INVENTION
• It is an aspect of the present invention to provide a baby monitor receiver that can control the volume level of other electronic devices.[0008]
• It is another aspect of the present invention to incorporate into the receiver of the baby monitor a control circuit that detects the sound level and, upon reaching a predetermined or user-set level, decreases or mutes the volume of another electronic device.[0009]
• It is yet another aspect of the present invention to control any electric noise-making device by incorporating an A/C control module into the present invention.[0010]
• These and other aspects of the present invention can be achieved by incorporating into a receiver of a baby monitor a system that can remotely control an electric or electronic device when the output sound level of the receiver reaches a reference level. The control can be by infrared, radio frequency or hardwire transmission of a volume control command to the electric or electronic device. By incorporating this control system into the baby monitor, a parent is ensured to hear sounds of a baby.[0011]
• More generally the invention comprises a monitor system, comprising a sound detector, a transmitter coupled to the sound detector for transmitting a signal upon said detector detecting a sound, and a control device that receives the signal and supplies a control signal to at least one device remote from the control device. A network can be interposed between the transmitter and the control device, wherein the network can be the Internet.[0012]
• The invention also comprises a method of monitoring a location, comprising the steps of detecting a sound, transmitting a signal upon detecting said sound, and controlling at least one device via said transmitted signal.[0013]
• The invention also comprises a method of enabling a user to monitor a location. By detecting a sound, transmitting to said user a signal upon detecting said sound, and controlling at least one device via said transmitted signal, the user can monitor a location.[0014]
• The invention further comprises software for a home network for processing an audio signal received from a sound detector, and controlling at least one device remote from the home network.[0015]
BRIEF DESCRIPTION OF THE DRAWINGS
• The above and other aspects, features and advantages of the present invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings in which:[0016]
• FIG. 1 is a front view of a baby monitor receiver according to an embodiment of the present invention;[0017]
• FIG. 2 is a side view of the baby monitor receiver depicted in FIG. 1 according to an embodiment of the present invention;[0018]
• FIG. 3 is a block diagram of a baby monitor system according to an embodiment of the present invention;[0019]
• FIG. 4 is a block diagram of the baby monitor receiver according to an embodiment of the present invention; and[0020]
• FIG. 5 is an operational flow chart of the baby monitor receiver according to an embodiment of the present invention.[0021]
DETAILED DESCRIPTION OF INVENTION
• Preferred embodiments of the present invention will be described herein below with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.[0022]
• As depicted in FIG. 1, a preferred embodiment of the[0023]baby monitor receiver100 comprises amain body104 and anantenna105. Incorporated into themain body104 is a speaker grating101 to allow the sound output from an internal speaker (not shown) to pass through themain body104. An ON/OFF-volumevariable resistor dial102 is located the side of themain body104 to control the power to and the volume of the receiver. Apower indicator light106 is positioned on the front of themain body104 to indicate a “power on” state of thereceiver100. An infrared (IR)window103 is located on the front ofmain body104 to allow IR signals to be transmitted to and from the internal circuitry of the receiver (not shown).
• FIG. 2 is a side view of the[0024]baby monitor receiver100 of FIG. 1. Depicted in FIG. 2 isslide switch201.Slide switch201 is preferably a two-position slide switch. A first position of theslide switch201 places the monitor into a normal operating mode and a second position of theslide switch201 places the monitor into a learn mode. When in the learn mode the monitor, according to one embodiment of the present invention, can be programmed to control a particular electric or electronic device, as described below.
• FIG. 3 is a block diagram of a baby monitor system according to an embodiment of the present invention. Referring to FIG. 3, the system allows a[0025]parent313 to monitor ababy303, and comprises atransmitter300, thereceiver100, and a remote device to be controlled, shown here astelevision310, the operation of which is as follows. Thetransmitter300 comprises asound grating301 to allow sound to pass through transmittermain body304 to a microphone or other sound-detecting device (not shown) inside thetransmitter300, an ON/OFF switch302 to control the power to the transmitter, anantenna305, and apower indicator light306. When thebaby303 makessounds307 the microphone (not shown) inside thetransmitter300 detects thesound307 and transmits it out throughantenna305.Receiver100 receives the sound throughantenna105 where it is processed. Thesound308 is output through the speaker (not shown) inside thereceiver100 through thespeaker grating101. Ifnoise309 output from thetelevision310 is at a level higher than thesound308 output from thereceiver100, theparent313 will not hear it and will be unaware of the cry of thebaby303.
• The received sound is also processed by control circuitry internal to the[0026]receiver100, described in detail below with respect to FIG. 4. Upon detecting a sound level greater than a stored reference level, thereceiver100 transmits an IR command signal throughwindow103. The IR command is received bytelevision310 throughIR window311, where the internal circuitry of thetelevision310 processes the command signal and mutes thesound309 coming fromspeaker312 oftelevision310, thus alertingparent313 and allowingparent313 to hear theoutput sound308 of thereceiver100.
• FIG. 4 is a block diagram of the[0027]baby monitor receiver100 according to an embodiment of the present invention. As shown in FIG. 4 the baby monitor receiver comprises theantenna105 connected to anRF receiver402. The transmitter300 (not shown) detectssound307 and transmits the sound to thebaby monitor receiver100. A signal transmitted from thetransmitter300 is received by theantenna105 and processed by theRF receiver402. The RF receiver is connected to aspeaker404. Thesound309 is output throughspeaker404.
• The signal received at[0028]antenna105 is also forwarded to controlcircuitry403. When theslide switch201 is in the normal operating mode (e.g. position 1), a central processing unit (CPU)407 of thecontrol circuitry403 compares the level of the received signal with a reference level stored in amemory unit408, which can be preset or user-set. If the received signal is less than the reference level thecontrol circuitry403 does nothing and continues to monitor the received signals, while thesound309 is output throughspeaker404. If the received signal is greater than the reference level, theCPU403 sends a mute command signal stored inmemory unit408 to commandcircuitry409, which operates anIR emitter405, which in turn outputs the IR signal to an electronic device such as a radio, stereo, etc., or thetelevision310 of FIG. 4.
• In the preferred embodiment, which uses IR technology to transmit the mute command, line-of-sight is maintained between the transmitter and electronic device. In another embodiment, an RF signal could be used to transmit the mute command, thus eliminating the line-of-site limitation. And in yet another embodiment the transmitter can be hardwired to the electronic device or even incorporated into the electronic device itself.[0029]
• Also, the command signal does not have to be limited to a mute command, as it can be any number of other commands, for example, an “off” command, a particular volume level command, or other command to decrease or eliminate the output sound from the device. The invention can also be incorporated into a separate electronic device that is placed in-line with an A/C current for an electric appliance. The baby monitor receiver would transmit an “off” command and upon receipt of the “off” command the electronic device would disconnect power to the appliance, eliminating the noise generated thereby.[0030]
• Referring again to FIG. 4., when[0031]slide switch201 is in the learn mode (e.g. position 2), thecontrol circuitry403 enters into a learn mode to store or program a mute command code particular to the electronic device sought to be controlled. Thecontrol circuitry403 contains thememory unit408 to store one or more commands depending on the particular embodiment of the present invention. Thememory unit408 can be preprogramned to control a particular electronic device, an embodiment which would not require theslide switch201 as no learn mode would be required by the user. Thememory unit408 can also be user-programmable to allow for the storage of one or more commands and to control one or more devices.
• When the[0032]slide switch201 is moved from position 1 to position 2 themonitor100 enters into the learn mode. TheCPU407 activates learningcircuitry410 to receive a command input through anIR detector406. The command to be stored or learned is input by pointing an IR emitter of a remote control of a remote device (not shown) at theIR detector406 and pressing a button on the remote control corresponding to the command the user desires to store in the monitor. TheCPU407 accepts the command signal from the learningcircuitry410 and stores the command in thememory unit408. Various additional programming methods are well known in the art and are not included herein.
• FIG. 5 is an operational flow chart of the baby monitor receiver according to an embodiment of the present invention. When the power of the[0033]baby monitor receiver100 is turned on, theCPU407 instep501 checks to determine if the receiver is in normal operating mode. If thereceiver100 is in normal operating mode, the system instep502 waits for a signal to be received from thetransmitter300. If no signal is received, the system returns to the start to wait for a received signal. If a signal is received, the system instep503 outputs the sound through thespeaker404 and theCPU407 compares the level of the received signal with the reference level stored inmemory unit408. Then instep504 theCPU407 determines if the level of the received signal is greater than the reference level. If the level of the received signal is not greater than the reference level, the system returns to step501. If the level of the received signal is greater than the reference level, thecontrol circuitry403 instep505 transmits the stored IR mute command through thecommand circuitry409 andIR emitter405 and returns to step501.
• If in[0034]step501 theCPU407 determines that the receiver is not in the normal operating mode, theCPU407 enters instep506 into the learn mode to store the user-entered commands. Instep507 theCPU407 activates theIR detector406. The system then instep508 checks if an IR signal command is received and if so, the system instep509 stores the IR signal command in thememory unit408 and returns to step501. If no signal command is received instep508, the system returns to step501.
• Several variations to the above-described system can be implemented that are also included within the scope of the invention. First, the above system can be used to monitor people and things other than a baby. The invention can be utilized to monitor a person who is sick or infirm. Also, the system can be readily modified to monitor an animal or any object where an alert to the user is desired when a sound is produced.[0035]
• Another modification to the invention relates to the transmitter. Where in the above-described embodiment the receiver compares the received sound to the stored reference signal, the transmitter can perform the comparison and transmit the control signal itself, directly to the controlled device or to a receiver for further transmission. Also, the signal (the sound signal and/or the central signal) can be transmitted via a computer network (including a home computer network), the Internet, etc., which may be interposed at any point between the receiver and the controlled device. Software can be used in a network, for example, to perform the audio and/or signal processing of the transmitter and/or receiver and direct them accordingly.[0036]
• As for the controlled device itself, the invention is not limited to reducing or muting its volume. For example, when a user is located in a noisy environment, the system can detect the noise level in the environment and amplify a audio signal accordingly, for example the ringing of a telephone, such that the user can hear the audio signal regardless of the noise level in the environment.[0037]
• While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.[0038]

Claims (21)

What is claimed is:

1. A monitor system, comprising:

a sound detector,

a transmitter coupled to said sound detector for transmitting a signal upon said detector detecting a sound; and

a control device that receives said signal and supplies a control signal to at least one device remote from the control device.

2. A monitor system as inclaim 1, wherein a network is interposed between the transmitter and the control device.

3. The monitor system as inclaim 2, wherein the network is the Internet.

4. A method of monitoring a location, comprising the steps of:

detecting a sound;

transmitting a signal upon detecting said sound; and

controlling at least one device via said transmitted signal.

5. A method of enabling a user to monitor a location, comprising the steps of:

detecting a sound;

transmitting to said user a signal upon detecting said sound; and

controlling at least one device via said transmitted signal.

6. Software for a home network for processing an audio signal received from a sound detector, and controlling at least one device remote from the home network.

7. A baby monitor, comprising:

a transmitter having a sound detecting device for detecting sound and transmitting the detected sound; and

a receiver having a speaker for receiving the detected sound and outputting the detected sound, and means for controlling a volume level of at least one device remote from said receiver having at least one speaker.

8. A baby monitoring system comprising:

a transmitter having a sound-detecting device and an antenna, the transmitter detecting sound and transmitting the detected sound through the antenna; and

a receiver having an antenna for receiving the detected sound, comprising:

means for comparing a level of the detected sound to a reference level; and

means for controlling at least one device remote from the receiver when the level of the detected sound is greater than the reference level.

9. The system ofclaim 8, wherein the means for controlling decreases the volume of the at least one device.

10. The system ofclaim 8, wherein the means for controlling mutes the volume of the at least one device.

11. The system ofclaim 8, wherein the means for controlling disconnects the power to the at least one device.

12. A baby monitor, comprising:

a sound-detecting device;

a transmitter connected to the sound-detecting device for transmitting a detected sound;

a receiver for receiving the detected sound;

a speaker connected to the receiver for outputting the detected sound;

a central processing unit (CPU) connected to the receiver for comparing the level of the detected sound to a reference level; and

a second transmitter connected to the CPU for transmitting a control command to at least one device remote from the receiver.

13. The baby monitor ofclaim 12, wherein the control command is one of a command to decrease volume, mute volume and disconnect power.

14. The baby monitor ofclaim 13, wherein the second transmitter is one of an infrared transmitter, a radio frequency transmitter and a hardwire connection.

15. A method of programming a baby monitor, comprising the steps of:

transmitting a command signal from a remote control of a remote device;

receiving the command signal from the remote control; and

storing the command signal in a memory.

16. The method ofclaim 15, wherein the command signal is transmitted by one of an infrared transmission, a radio frequency transmission and a hardwire connection transmission.

17. A method of monitoring a baby, comprising the steps of:

detecting a sound from a baby;

transmitting the sound from a transmitter to a receiver;

outputting the sound from the receiver;

comparing the level of the sound to a reference level;

transmitting from the receiver at least one command to at least one device remote from the receiver;

receiving the at least one transmitted command at the at least one device remote from the receiver; and

performing the command.

18. The method ofclaim 17, further comprising the step of storing the reference level in a memory of the receiver.

19. The method ofclaim 18, wherein the storing step further comprises the steps of:

transmitting from a remote control of one of the at least one device remote from the receiver a command signal;

receiving at the receiver the command signal; and

storing the command signal in a memory.

20. The method ofclaim 19, wherein the command signal is transmitted by one of an infrared transmission, a radio frequency transmission and a hardwire connection transmission.

21. A baby monitor, comprising:

a transmitter having a sound detecting device for detecting sound and transmitting the detected sound, and the detected sound transmitted in a signal formatted to be received by a receiver for receiving the detected sound and outputting the detected sound, having a speaker and means for controlling a volume level of at least one device remote from said receiver having at least one speaker.

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