Summary of the invention
The main purpose of the present invention is to provide a kind of signal receiving device, stream media transmission system and streaming media sidesMethod, it is intended to solve existing receiving end and play the nonsynchronous technical problem of end data.
To achieve the above object, the present invention provides a kind of signal receiving device, and the stream media transmission system further includes letterNumber emitter, the signal receiving device and playback equipment are communicated to connect by transmission line, the sender unit with believeSource device is communicated to connect by transmission line, and the signal receiving device includes: the first communications module, the first buffer, firstHDMI interface and first processor；
Wherein, the first processor includes the first analysis module, the first removing module and the first output module；
First buffer obtains received from sender unit transmission by first communications moduleStream medium data, the stream medium data include audio data and video data；
First buffer is also used to using at least one data packet of the audio data as audio buffer to be playedTo the first cache unit of the first buffer, and using at least one data packet of the video data as video cache to be playedTo the second cache unit of the first buffer；
Whether the amount of storage that first analysis module is used to detect the first cache unit audio to be played is greater than theWhether one threshold value or the amount of storage of the second cache unit video to be played are greater than second threshold；If the first cache unit waits broadcastingThe amount of storage of playback frequency is greater than first threshold or the amount of storage of the second cache unit video to be played is greater than second threshold, thenThe first removing module empties first cache unit and second cache unit；
If the amount of storage of the first cache unit audio to be played is less than or equal to first threshold and second cache unitThe amount of storage of video to be played is less than or equal to second threshold, then first output module control the first cache unit send toPlaying audio-fequency data and the second cache unit of control send video data to be played to the first HDMI with signal receiving deviceThe playback equipment of interface electrical connection.
Preferably, first communications module is radio communication mold group；The wireless communication frequency of first communications moduleFor 2.4GHz, 5.15~5.825GHz or 60GHz.
Preferably, first output module includes delay adjustment unit and output control unit；The delay adjustment is singleMember controls first cache unit and is sending audio to be played at the first time to output control unit, and it is slow to control described secondMemory cell sends audio to be played to output control unit in the second time, and the first time is greater than second time；InstituteOutput control unit is stated to set the broadcasting that the audio to be played and video to be played output give signal receiving device electrical connectionIt is standby.
Preferably, the signal receiving device is additionally provided with infrared remote receiver, and the infrared remote receiver is for receiving remote controlThe infrared remote-controlled signal is simultaneously converted into electric signal by the infrared remote-controlled signal of device transmitting；The first processor is by the telecommunicationsNumber it is transferred to the first communications module, the electric signal is sent to sender unit by the first communications module.
To achieve the above object, the present invention also provides a kind of stream media transmission system, the stream media transmission system includesSender unit and signal receiving device, the signal receiving device and playback equipment are communicated to connect by transmission line, describedSender unit and source device are communicated to connect by transmission line；The signal receiving device includes: the first communications module,One buffer, the first HDMI interface and first processor；
Wherein, the first processor includes the first analysis module, the first removing module and the first output module；
First buffer obtains received from sender unit transmission by first communications moduleStream medium data, the stream medium data include audio data and video data；
First buffer is also used to using at least one data packet of the audio data as audio buffer to be playedTo the first cache unit of the first buffer, and using at least one data packet of the video data as video cache to be playedTo the second cache unit of the first buffer；
Whether the amount of storage that first analysis module is used to detect the first cache unit audio to be played is greater than theWhether one threshold value or the amount of storage of the second cache unit video to be played are greater than second threshold；If the first cache unit waits broadcastingThe amount of storage of playback frequency is greater than first threshold or the amount of storage of the second cache unit video to be played is greater than second threshold, thenThe first removing module empties first cache unit and second cache unit；
If the amount of storage of the first cache unit audio to be played is less than or equal to first threshold and second cache unitThe amount of storage of video to be played is less than or equal to second threshold, then first output module control the first cache unit send toPlaying audio-fequency data and the second cache unit of control send video data to be played and broadcast to what is be electrically connected with signal receiving devicePut equipment.
Preferably, the signal receiving device is additionally provided with infrared remote receiver, for receiving the infrared remote control of remote control deviceSignal, and infrared remote-controlled signal is converted into electric signal；The first processor is by the electric signal transmission to the first communication mouldGroup, the electric signal is sent to sender unit by the first communications module；The sender unit includes secondCommunications module, second processor and infrared transmitter；Second communications module is received through the transmission of the first communications moduleElectric signal；The electric signal is reduced into infrared remote-controlled signal by the second processor；The infrared transmitter will be described infrared distantControl signal is transmitted to the sender unit, exports corresponding stream medium data to control the sender unit.
Preferably, the sender unit further includes the second buffer；Second processor includes the second analysis module, theTwo remove module and the second output module；Second buffer is used to obtain the stream medium data exported from source device, describedStream medium data includes audio data and video data；Second buffer is also used to make at least one data packet of audio dataFor the third cache unit of audio buffer to be played to the second buffer, and at least one data packet of the video data is madeFor the 4th cache unit of video cache to be played to the second buffer；Second analysis module is slow for detecting the thirdWhether the amount of storage of memory cell audio to be played is greater than the amount of storage of third threshold value or the 4th cache unit video to be playedWhether the 4th threshold value is greater than；If the amount of storage of third cache unit audio to be played is greater than third threshold value or the 4th caching is singleThe amount of storage of member video to be played is greater than the 4th threshold value, then the second removing module empties the third cache unit and described4th cache unit；
If the amount of storage of third cache unit audio to be played is less than or equal to third threshold value and the 4th cache unitThe amount of storage of video to be played is less than or equal to the 4th threshold value, then second output module controls second buffer for instituteIt states stream medium data and the signal receiving device is sent to by second communications module.
Preferably, the sender unit further includes coding module, and the coding module is used for the second buffer is defeatedVideo data out is encoded, and it is encoded after video data the signal be sent to by second communications module connectReceiving apparatus；
The signal receiving device further includes decoder module, and the decoder module is used to export second cache unitVideo data to be played be decoded, and export to the playback equipment.
To achieve the above object, the present invention also provides a kind of flow-medium transmission methods, are applied to signal receiving device, describedSignal receiving device and sender unit communicate to connect, which comprises obtain the first communications module and send out from the signalThe stream medium data that injection device is sent, the stream medium data includes audio data and video data；The audio number that will be receivedAccording at least one data packet as audio buffer to be played to the first cache unit, and by the video data at least oneSecond cache unit of the data packet as video cache to be played extremely；Detect the storage of the first cache unit audio to be playedWhether amount is greater than first threshold or whether the amount of storage of the second cache unit video to be played is greater than second threshold；If firstThe amount of storage of cache unit audio to be played is greater than first threshold or the amount of storage of the second cache unit video to be played is bigIn second threshold, then first cache unit and second cache unit are emptied；If the first cache unit audio to be playedAmount of storage be less than or equal to the amount of storage of first threshold and the second cache unit video to be played and be less than or equal to secondThreshold value then sends audio to be played and video to be played to the playback equipment being electrically connected with signal receiving device.
Preferably, the audio to be played is being sent to the playback equipment at the first time, corresponding with audio to be playedBe sent to the playback equipment in the second time to unicast packets, the first time is greater than second time.
Compared with existing design, a kind of signal receiving device, stream media transmission system and Streaming Media provided by the invention are passedTransmission method.The signal transmission system in the present invention includes sender unit and the letter with sender unit communication connectionNumber reception device, the sender unit are connect with source device, the transmission of flow media data for exporting source device toSignal receiving device, the stream medium data include video data and audio data.The audio number that signal receiving device will receiveIt is respectively stored in the first cache unit and the second cache unit according to video data, and passes through the first cache unit and the second cachingUnit exports audio data and video data to playback equipment, to carry out stream medium data broadcasting in playback equipment respectively.
When the audio data in the first cache unit is more than more than the video data in first threshold or the second cache unitWhen second threshold, the synchronous video data by the audio data and the second cache unit in the first cache unit is reset, withEnsure the synchronism of audio data and video data, with effective address signal reception device because transmission of flow media data delay causesThere is Caton when carrying out stream medium data broadcasting in playback equipment.Simultaneously as audio data and video data are carried out respectivelyCaching, and the caching time delay of audio data and video data is detected respectively, in audio data or video data, any one is slowCapacity is deposited more than threshold value, then synchronizes and carries out the video data in the audio data and the second cache unit in the first cache unitIt resets, the synchronism of the video data output in the audio data and the second cache unit to ensure the output of the first cache unit,To solve the problems, such as the delay Caton of streaming media.
Further, the time of the audio data of the first cache unit of control output is later than the video counts of the corresponding audio dataAccording to time, so as to avoid audio data and video data due to decoding time disunity caused by audio, video data broadcastingPut the nonsynchronous problem of equipment end.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, rightThe present invention is further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, notFor limiting the present invention.
The description and claims of this application and term " first ", " second ", " third ", " in above-mentioned attached drawingThe (if present)s such as four " are to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should manageThe data that solution uses in this way are interchangeable under appropriate circumstances, so that the embodiments described herein can be in addition to illustrating hereinOr the sequence other than the content of description is implemented.In addition, term " includes " and " having " and their any deformation, it is intended thatCover it is non-exclusive include, for example, containing the process, method, system, product or equipment of a series of steps or units need not limitIn step or unit those of is clearly listed, but may include be not clearly listed or for these process, methods, produceThe other step or units of product or equipment inherently.
It should be noted that the description for being related to " first ", " second " etc. in the present invention is used for description purposes only, and cannotIt is interpreted as its relative importance of indication or suggestion or implicitly indicates the amount of storage of indicated technical characteristic.It defines as a result,The feature of " first ", " second " can explicitly or implicitly include at least one of the features.In addition, between each embodimentTechnical solution can be combined with each other, but must based on can be realized by those of ordinary skill in the art, work as technical solutionCombination there is conflicting or cannot achieve when and will be understood that the combination of this technical solution is not present, also do not wanted in the present inventionWithin the protection scope asked.
The present invention provides a kind of signal receiving device, stream media transmission system and flow-medium transmission method.In the present inventionThe signal transmission system includes sender unit and the signal receiving device with sender unit communication connection, the signalEmitter is connect with source device, and the transmission of flow media data for exporting source device is to signal receiving device, the streamMedia data includes video data and audio data.Signal receiving device deposits the audio data received and video data respectivelyStorage exports audio number in the first cache unit and the second cache unit, and by the first cache unit and the second cache unit respectivelyAccording to video data to playback equipment, to carry out stream medium data broadcasting in playback equipment.
When the audio data in the first cache unit is more than more than the video data in first threshold or the second cache unitWhen second threshold, the synchronous video data by the audio data and the second cache unit in the first cache unit is reset, withEnsure the synchronism of audio data and video data, with effective address signal reception device because transmission of flow media data delay causesThere is Caton when carrying out stream medium data broadcasting in playback equipment.Simultaneously as audio data and video data are carried out respectivelyCaching, and the caching time delay of audio data and video data is detected respectively, in audio data or video data, any one is slowCapacity is deposited more than threshold value, then synchronizes and carries out the video data in the audio data and the second cache unit in the first cache unitIt resets, the synchronism of the video data output in the audio data and the second cache unit to ensure the output of the first cache unit,To solve the problems, such as the delay Caton of streaming media.
Further, the time of the audio data of the first cache unit of control output is later than the video counts of the corresponding audio dataAccording to time, so as to avoid audio data and video data due to decoding time disunity caused by audio, video data broadcastingPut the nonsynchronous problem of equipment end.
Referring to Fig. 1, Fig. 1 is a kind of stream media transmission system 100 that one embodiment of the invention provides, the streaming mediaSystem 100 includes signal receiving device 10 and sender unit 20.Wherein, signal receiving device 10 and playback equipment 50 are logicalTransmission line communication connection is crossed, to realize the transmission of signal between signal receiving device 10 and playback equipment 50.Sender unit20 by transmission line and source device 30 communicate to connect the stream medium data for receiving the output of source device 30 and by stream matchmakerVolume data is transferred to signal receiving device 10 by wireless communication so that signal receiving device 10 by the stream medium data export toPlayback equipment 50 plays out.Wherein, which includes video data and audio data, the audio data and video countsAccording in transmission, transmit in the form of data packet, wherein the data package size of audio data and the data packet of video data are bigIt is small to can be set as needed.Preferably, the data packet of audio data is less than or equal to audio to be played, the number of video dataIt is less than or equal to video to be played according to packet.
Preferably, video data is HD video data, i.e. the resolution ratio of the video data is at least 480p, and frame per second is at leastFor 24fps.
Fig. 2-4 is please referred to, specifically, signal receiving device 10 includes the first HDMI interface 102, the first buffer 106, theOne communications module 103 and first processor 104.First processor 104 and the first HDMI interface 102, the first buffer 106 withAnd first communications module 103 be electrically connected so that the first HDMI interface 102, the first buffer 106 and the first communications module 103It cooperates.
Wherein, the first HDMI interface 102 is connected by transmission line and is connect with playback equipment 50, so that signal receives dressSet 10 and playback equipment 50 communicate to connect, signal receiving device 10 is received into vision signal and is exported to playback equipment 50, fromAnd realize vision signal in the broadcasting of playback equipment 50.
First communications module 103 be preferably radio communication mold group, for 20 company of carrying out wireless communication of sender unitIt connects, it is preferable that the wireless communication frequency of the first communications module is 2.4GHz, 5.15~5.825GHz or 60GHz.
First processor 104 includes that the first analysis module 1043, first removes module 1044 and the first output module1045。
Wherein, the first buffer 106 is for obtaining the Streaming Media that the first communications module 103 is sent from sender unit 20Data.
Specifically, the first buffer 106 includes the first cache unit 1061 and the second cache unit 1063, first cachingDevice 106 is used for the using at least one data packet of the audio data received as audio buffer to be played to the first bufferOne cache unit 1061, and using at least one data packet of the video data as video cache to be played to the first buffer106 the second cache unit 1063.
Whether the amount of storage that the first analysis module 1043 is used to detect the audio to be played of the first cache unit 1061 is greater than theWhether one threshold value or the amount of storage of the video to be played of second cache unit 1063 are greater than second threshold.
If the amount of storage of the audio to be played of the first cache unit 1061 is greater than first threshold or second cache unitThe amount of storage of 1063 videos to be played is greater than second threshold, then the first removing module 1044 empties first cache unit 1061With second cache unit 1063, the data of any one are avoided in the first cache unit 1061 or the second cache unit 1063Accumulation, avoids the output of the audio data and video data of signal receiving device 10 asynchronous.
If the amount of storage of the audio to be played of the first cache unit 1061 is less than or equal to first threshold and second cachingThe amount of storage of the video to be played of unit 1063 is less than or equal to second threshold, then the first caching of the first output module 1045 control is singleMember 1061 sends audio to be played and the second cache unit 1063 of control send video to be played to signal receiving device 10The playback equipment 50 of electrical connection, so that playback equipment 50 plays corresponding band playback data and data packet.
Wherein, the first output module 1045 includes delay adjustment unit 10451 and output control unit 10453.Delay is adjustedWhole unit 10451 controls the first cache unit 1061 and sends audio to be played to output control unit 10453 in first time t1,And control second cache unit 1063 and send audio to be played to output control unit 10453 in the second time t2, firstTime t1 is greater than the second time t2.
Audio to be played and video to be played output are given signal receiving device 10 and are electrically connected by output control unit 10453Playback equipment 50, which is electrically connected by HDMI interface 102 with signal receiving device 10.
It is later than the video data of the corresponding audio data by the time of the audio data of control the first cache unit outputTime, so as to avoid audio data and video data due to decoding time disunity caused by data at playback equipment endNonsynchronous problem.
Referring to Fig. 5, sender unit 20 connects including the second communications module 201, second processor 202, the 2nd HDMIMouth 203 and the second buffer 205.Second processor 202 is electrically connected with the second communications module 201 and the second HDMI interface 203It connects, is cooperated with controlling the second communications module 201 and the second HDMI interface 203.
Wherein, the second communications module 201 is preferably radio communication mold group, for carrying out channel radio with signal receiving device 10Letter connection, so that the signal that source device 30 exports can be sent to by wireless transmission and be transferred to signal receiving device10, to effectively solve the problems, such as the limitations of traditional source device and playback equipment wire transmission mode.
Second HDMI interface 203 is connected by transmission line and is connect with source device 30, so that source device 30 and letterNumber emitter 20 communicates to connect and the vision signal that can export is to sender unit 20.Sender unit 20 will receiveTo screen signal be transmitted to signal receiving device 10 so that signal receiving device 10 exports the vision signal to playback equipment50, to realize the broadcasting to the vision signal.
Second buffer 205 is used to receive the stream medium data of the transmission of source device 30, and stream medium data is passed through theTwo communications modules 201 are sent to signal receiving device 10, so that stream medium data is exported and set to broadcasting by signal receiving device 10Standby 50.
Referring again to Fig. 2 and Fig. 5, in some embodiments, signal receiving device 10 further includes infrared remote receiver 105,The infrared remote receiver 105 is used to receive the infrared remote-controlled signal for the remote control device transmitting being adapted to source device 30, and this is redOuter remote signal is converted into electric signal, which is preferably pulse electrical signal.Meanwhile first processor 104 controls that this is infraredReceiver 105 can give the electric signal transmission being converted by infrared remote-controlled signal to the first communications module 103, with logical by firstBelieve that electric signal is sent to sender unit 20 by mould group 103 so that sender unit 20 electric signal is reduced into it is infrared distantControl signal is simultaneously sent to source device 30, so that source device 30 exports corresponding stream medium data according to infrared remote-controlled signal.
Sender unit 20 further includes the infrared transmitter 204 being electrically connected with second processor 202.Infrared transmitter204 electric signal for the infrared remote-controlled signal for receiving remote control device sending to be converted into is reduced into infrared remote-controlled signal, andEmit the infrared remote-controlled signal to source device 30, exports corresponding stream matchmaker to control source device 30 according to infrared remote-controlled signalVolume data, to realize remotely to the output signal switching control of the source device 30.
In some embodiments, stream medium data includes video data and audio data, which includes multiple numbersAccording to packet, data include multiple data packets, and the second buffer 205 includes third cache unit and the 4th cache unit.Second cachingDevice 205 is incited somebody to action using at least one data packet of the audio data received as audio buffer to be played to third cache unitAt least one data packet of the video data is as video cache to be played to the 4th cache unit.
Second processor 202 further includes that the second analysis module 2021, second removes module 2022 and the second output module2023.Wherein, whether the amount of storage that the second analysis module 2021 is used to detect the third cache unit audio to be played is greater thanWhether third threshold value or the amount of storage of the 4th cache unit video to be played are greater than the 4th threshold value.
If the amount of storage of third cache unit audio to be played is greater than third threshold value or the 4th cache unit is to be playedThe amount of storage of video is greater than the 4th threshold value, then the second removing module 2022 empties third cache unit and the 4th cache unitInterior cached data, i.e. synchronization are clear by the video data in the audio data and the 4th cache unit in third cache unitZero, to ensure the synchronism of audio data and video data, with the transmission of flow media data of effective address signal emitter 20Delay, it is ensured that stream medium data is synchronized and is sent to signal receiving device 10, plays end audio and video frequency signal difference to reduceThe phenomenon that step.
If the amount of storage of third cache unit audio to be played is less than or equal to third threshold value and the 4th cache unitThe amount of storage of video to be played is less than or equal to the 4th threshold value, then the second output module 2023 controls the second buffer 205 and will delayThe stream medium data deposited is sent to the signal receiving device 10 by the second communications module 201.
It is clear by the caching for being respectively provided with audio data and video data in sender unit 20 and signal receiving device 10Except mechanism, to more preferably ensure the synchronism of the stream media transmission system audio-video.
In some embodiments, sender unit 10 further includes coding module, which is used for the second cachingDevice 205 export stream medium data in video data and/or audio data encoded, and it is encoded after audio, videoData are sent to the signal receiving device 10 by the second communications module 201.Wherein, the coding standard of video data can beH.261, H.263 or H.264.
Signal receiving device 10 further includes decoder module, and decoder module is used for the first caching of the first buffer 106 is singleThe audio data of 1061 output of member is decoded and/or the video data to be played of the second cache unit output is decoded, andExporting the decoded audio and/or video data to the playback equipment.
Referring to Fig. 6, Fig. 6 is a kind of flow-medium transmission method that one embodiment of the invention provides, the streaming media sideMethod is applied to the signal receiving device 10 of stream media transmission system 100, which further includes signal transmitting dress20 are set, sender unit 20 is communicated to connect with corresponding playback equipment 50 by transmission line, sender unit 20 and information sourceEquipment 30 is communicated to connect by transmission line, which is provided with the first communications module 103, flow-medium transmission methodIncluding step S101-S105:
Step S101: it obtains through the received Streaming Media sent from the sender unit of first communications moduleData, the stream medium data include audio data and video data.
Sender unit 20 and source device 30 communicate to connect, and source device 30 exports stream medium data and emits to signalStream medium data is sent to signal receiving device 10 by the second communications module 201 by device 20, sender unit 20.SignalReception device 10 receives the stream medium data that the second communications module 201 is sent, the stream medium data by the first communications module 103Including video data and audio data.
First communications module 103 and the second communications module 201 are preferably radio communication mold group.
Step S102: delay at least one data packet of the audio data received as audio buffer to be played to firstMemory cell, and using at least one data packet of the video data as video cache to be played to the second cache unit.
Data include multiple data packets, and video data includes multiple data packets, and signal receiving device 10 connects what is receivedFirst cache unit of at least one data packet of the audio data received as audio buffer to be played to the first buffer, andUsing at least one data packet of the video data as the second cache unit of video cache to be played to the first buffer
Step S103: whether the amount of storage of detection the first cache unit audio to be played is greater than first threshold or describedWhether the amount of storage of the second cache unit video to be played is greater than second threshold.
Step S104: if the amount of storage of the first cache unit audio to be played is greater than first threshold or second caching is singleThe amount of storage of member video to be played is greater than second threshold, then empties first cache unit and second cache unit.
Step S105: if the amount of storage of the first cache unit audio to be played is less than or equal to first threshold and described secondThe amount of storage of cache unit video to be played is less than or equal to second threshold, then sends audio to be played and video to be played extremelyThe playback equipment being electrically connected with signal receiving device.
Preferably, audio to be played is being sent to the playback equipment by the control of signal receiving device 10 at the first time,And control and corresponding with audio to be played will be sent to the playback equipment in the second time to unicast packets, it is big at the first timeIn second time.
Referring to Fig. 7, in some embodiments, the present invention also provides a kind of signal receiving devices 10 comprising first is logicalBelieve mould group 103, the first HDMI interface 102, first memory 105, first processor 104 and the first bus 106.First communicationMould group 103, the first HDMI interface 102, first memory 105 are connect by the first bus 106 with first processor 104.
First memory 105 include at least a type of readable storage medium storing program for executing, the readable storage medium storing program for executing include flash memory,Hard disk, multimedia card, card-type memory (for example, SD or DX memory etc.), magnetic storage, disk, CD etc..This first is depositedReservoir 105, for storing computer-readable flow-medium transmission method program.
First processor 104 can be central processing unit (Central Processing Unit, CPU), controller, micro-Controller, microprocessor or other data processing chips, first processor 104 can call the journey stored in first memory 105Sequence code or processing data, to perform the steps of
It obtains through the received stream medium data sent from the sender unit of first communications module, it is describedStream medium data includes audio data and video data；
Using at least one data packet of the audio data received as audio buffer to be played to the first cache unit, andUsing at least one data packet of the video data as video cache to be played to the second cache unit；
Whether the amount of storage for detecting the first cache unit audio to be played is greater than first threshold or second cachingWhether the amount of storage of unit video to be played is greater than second threshold；
If the amount of storage of the first cache unit audio to be played is greater than first threshold or second cache unit is to be playedThe amount of storage of video is greater than second threshold, then empties first cache unit and second cache unit.
If the amount of storage of the first cache unit audio to be played is less than or equal to first threshold and second cache unitThe amount of storage of video to be played is less than or equal to second threshold, then sends audio to be played and video to be played extremely connects with signalThe playback equipment of receiving apparatus electrical connection.
The above is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hairEquivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skillsArt field, is included within the scope of the present invention.