CN103491428A - System and method for processing digital audio of smart television - Google Patents
System and method for processing digital audio of smart television Download PDFInfo
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- CN103491428A CN103491428A CN201310391397.7A CN201310391397A CN103491428A CN 103491428 A CN103491428 A CN 103491428A CN 201310391397 A CN201310391397 A CN 201310391397A CN 103491428 A CN103491428 A CN 103491428A
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Abstract
The invention discloses a system for processing digital audio of a smart television. The system comprises a voice sensor, a loudspeaker, an A/D converter, a perceptual model, a bit distributor, an MPEG encoder, various audio decoders and a control circuit. By means of the system and method for processing the digital audio of the smart television, the digital television can have the functions of recording, storage, transmission and playing of the audio.
Description
Technical field
The present invention relates to the digital television techniques field, be specifically related to a kind of system and method for digital audio processing of intelligent television.
Background technology
Along with the develop rapidly of ICT (information and communication technology), Digital Television is progressively becoming the important terminal of information interaction and information service.Digital audio-frequency apparatus is the important component part of Digital Television, the function of Digital Television audio frequency apparatus just is converted into the digital audio received simply analog signal and plays in the market, if the client at television terminal needs interactively to carry out communication, common practices is by inputting word information or selects given function choosing-item, and this single information interaction mode makes Digital Television can not in informatization and network, bring into play larger effect.The intelligent digital television audio frequency apparatus not only can process the digital audio and video signals of automatic network, can also process the analog signal of television terminal input, and the analog signal received is converted into to digital signal, then is transferred to corresponding receiving equipment or buffer memory.Digitized speech ciphering equipment Digital Television the is possessed function of voice transfer simultaneously, for the functions such as the speech recognition that realizes intelligent television, IP phone, Web conference provide hardware foundation later, will improve the interactive and intelligent of Digital Television greatly.
General digital audio-frequency apparatus system comprises the basic elements of character such as audio sensor, A/D converter (analog to digital converter), encoder, decoder.Audio sensor is converted into analog electrical signal by natural sound and passes to A/D converter, the signal of telecommunication is deleted high-frequency noise through the low pass filter in A/D converter, then by sampler, signal is sampled, passing to quantizer is quantized again, after A/D converter, natural sound originally just is converted into binary digital information like this.But need in actual applications binary audio information is encoded according to the audio standard agreement, this function is completed by encoder, although general audio coding standard is more, but, because audio decoder has the function of multiple standards decoding, therefore can only use a kind of encoder and multiple decoder.It is the audio-frequency information that meets Moving Picture Experts Group-2 by information coding that native system is selected the mpeg audio encoder.The decoding of audio-frequency information is the reverse execution of top cataloged procedure.In addition, above process will have the support of a series of associated components such as corresponding buffer and multiplexer.
General Digital Television audio frequency apparatus only has unidirectional decoding function, its main process is the audio stream that receives various standards, then the audio decoder passed through is converted into binary stream by audio stream, then is converted into the signal of telecommunication by digital to analog converter, finally by audio player, is play.For the different decoder of the audio frequency needs of the various criterion of decoding and corresponding software, also need certain caching mechanism to coordinate the speed difference of each parts.In order to realize two-way conversation mechanism, generally need to add other assigned in equipment.
Existing Digital Television audio frequency apparatus does not generally have the transmitted in both directions function of sound, can only carry out the decoding function of audio stream, when the needs transfer voice, need to add a series of equipment; Still can't be transmitted although perhaps there is the function of coding, also can not be carried out the functions such as IP phone.When being surfed the Net by Digital Television, generally adopt the mode of remote control input; Although the touch screen type television set has solved the remote control problem, people need near television set, very inconvenience.Speech recognition system should be a kind of input mode preferably, but current most hardware devices are not supported this function.At first need comparatively perfect audio hardware system and corresponding software support in order to solve this series of shortcoming.
Summary of the invention
The objective of the invention is, for intelligent digital television provides a kind of digital audio two-way treatment system, to make Digital Television there is the function of recording, storing audio, transmission of audio and audio plays.
The embodiment of the present invention provides a kind of system of digital audio processing of intelligent television, comprising:
Sound transducer, loud speaker, A/D converter, sensor model, bit distributor, mpeg encoder, various audio decoder and control circuit form, wherein:
Sound transducer, for being responsible for the sound collection of digital television terminal user, generates the speech simulation signal, passes to A/D converter;
Loud speaker is for playing sound;
It is digital signal by analog signal conversion that A/D converter is used for;
Sensor model is for guaranteeing that quantization noise is lower than audible threshold value;
Bit distributor is for estimating shield threshold value and take audio signal frequency spectrum energy and psychological model as according to carrying out allocation bit;
Mpeg encoder is for becoming to meet the audio-frequency information of mpeg standard by audio signal compression;
The MEPG decoder is for becoming encoding stream by the audio decompression of compression, so that D/A converter is converted to analog signal by digital signal.
Described A/D converter is for carrying out signal sampling, each sample being quantized, and the signal drawn is the digital signal of un-encoded.
Accordingly, the embodiment of the present invention also provides a kind of method of digital audio processing of intelligent television, and described method comprises:
Step 1, digital TV terminal client send natural sound, and audio sensor receives and be translated into analog signal;
Step 3, audio coder become digital audio signal coding the audio-frequency information that meets certain standard under various control informations, then judge whether audio-frequency information is sent to memory device or digital interface, if just proceed to step 6, no person judges whether to forward to multiplexer, if forward step 4 to, otherwise just abandon;
Step 4, multiplexer are sent the compressed audio information received, and have buffer to preserve waiting message;
Step 5, buffer are issued demultiplexer by the information received and are decomposited encoding stream;
Step 6, digital interface judgement have or not digital device request audio-frequency information, have with regard to audio reception and send digital device to, and no person is data streams not;
Step 7, decoder receive encoding stream, by its decompress(ion), and the reduction audio signal;
Step 8, D/A converter receive digital audio and video signals, and are translated into analog signal, pass to the equipment of raising one's voice accordingly or interface.
The present invention has following beneficial effect, the objective of the invention is for intelligent digital television provides a kind of digital audio processing system and method, and be that television terminal not only can receive audio plays, can also record the issue audio frequency, improved the interactive of intelligent television.For the service based on intelligent digital audio equipment provides hardware foundation.
The accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, below will the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the system configuration schematic diagram of the digital audio processing of the intelligent television in the embodiment of the present invention;
Fig. 2 is the method flow schematic diagram in the system of the digital audio processing based on intelligent television in the embodiment of the present invention;
Fig. 3 is another schematic flow sheet of method in the system of the digital audio processing based on intelligent television in the embodiment of the present invention;
Fig. 4 is the structural representation of the encoder of the digital audio-frequency apparatus in the embodiment of the present invention;
Fig. 5 is the encoding and decoding flow chart of the digital audio-frequency apparatus in the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making all other embodiment that obtain under the creative work prerequisite, belong to the scope of protection of the invention.
The objective of the invention is, for intelligent digital television provides a kind of digital audio two-way treatment system, to make Digital Television there is the function of recording, storing audio, transmission of audio and audio plays.
The invention provides the two-way treatment system of a kind of digital audio, different from one-way audio device systems in the past is, this system can be converted into digitized audio message by the voice messaging of digital television terminal user, and is encoded to the audio stream or the file that meet certain standard and is transmitted.The essential structure of this system as shown in Figure 1, this system is the function element that audio coder and decoder are reasonably combined by control circuit, considers therein the series of problems such as clock synchronous, transmission control, odd encoder standard, multisensor, many players.Audio sensor and audio player can be in parallel a plurality of, realize a plurality of interface transmission.Decoder need to have the function to multiple audio standard decoding, and decoder is comprised of Decoder bank and decision circuitry thus.As long as but the coding of audio frequency is generally realized to a kind of coding standard, so encoder can be selected any one in some general audio standard encoders.
By the digital audio processing system of this combination, can effectively process the audio file of network or local storage, realize sound-recording function and preserve or send digital audio at digital TV terminal simultaneously.As shown in Figure 2, the Internet Transmission schematic diagram while using Digital Television as shown in Figure 3 for the flow process of this digital audio-frequency apparatus when being processed sound.
Below in conjunction with Fig. 2 and Fig. 3, the composition of this equipment is described: this equipment mainly is comprised of sound transducer, loud speaker, A/D converter, sensor model, bit distributor, mpeg encoder, various audio decoder and control circuit.The function of each several part is as follows:
Sound transducer mainly is responsible for the sound collection of digital television terminal user, generates the speech simulation signal, passes to A/D converter.Loud speaker is used for playing sound.
A/D converter is digital signal by analog signal conversion, and key step is to carry out signal sampling, each sample is quantized, and the signal drawn is the digital signal of un-encoded
The sensor model major function is to guarantee that quantization noise is lower than audible threshold value.Bit distributor is for estimating shield threshold value and take audio signal frequency spectrum energy and psychological model as according to carrying out allocation bit.
The function of mpeg encoder is audio signal compression to be become to meet the audio-frequency information of mpeg standard.The MEPG decoder becomes encoding stream with other relative decoding devices by the audio decompression of compression, so that D/A converter is converted to analog signal by digital signal.
Control circuit is used for that control signal flows to and the data such as clock.
The main flow process of this device processes sound is described below in conjunction with Fig. 2 and Fig. 3:
The first step: the digital TV terminal client sends natural sound, and audio sensor receives and be translated into analog signal.
Second step: digital to analog converter is converted into digital signal by analog signal.
The 3rd step: audio coder becomes digital audio signal coding the audio-frequency information that meets certain standard under various control informations, then judge whether audio-frequency information is sent to memory device or digital interface, if just proceed to the 6th step, no person judges whether to forward to multiplexer, if forward the 4th step to, otherwise just abandon.
The 4th step: multiplexer is sent the compressed audio information received, and has buffer to preserve waiting message.
The 5th step: buffer is issued demultiplexer by the information received and is decomposited encoding stream.
The 6th step: the digital interface judgement has or not digital device request audio-frequency information, has with regard to audio reception and sends digital device to, and no person is data streams not.
The 7th step: decoder receives encoding stream, by its decompress(ion), and the reduction audio signal.In this step, if a plurality of decoders are arranged, use standard compliant decoder.
The 8th step: D/A converter receives digital audio and video signals, and is translated into analog signal, passes to the equipment of raising one's voice accordingly or interface.
Following Fig. 4 and Fig. 5 have provided respectively the detailed design figure of the core component encoder of this digital audio-frequency apparatus: this encoder can be converted into sound the audio frequency that meets the MPEG-2 audio standard, MPEG compatible-1 standard, and cataloged procedure is as described above.Decoder only provides the decoder design figure of a MPEG standard herein, other can be with reference to related data, this place is discussed no longer one by one.
The present invention has following beneficial effect, the objective of the invention is for intelligent digital television provides a kind of digital audio processing system and method, and be that television terminal not only can receive audio plays, can also record the issue audio frequency, improved the interactive of intelligent television.For the service based on intelligent digital audio equipment provides hardware foundation.
One of ordinary skill in the art will appreciate that all or part of step in the whole bag of tricks of above-described embodiment is to come the hardware that instruction is relevant to complete by program, this program can be stored in a computer-readable recording medium, storage medium can comprise: read-only memory (ROM, Read Only Memory), random access memory (RAM, Random Access Memory), disk or CD etc.
The system and method for the digital audio processing of above a kind of intelligent television that the embodiment of the present invention is provided is described in detail, applied specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment is just for helping to understand method of the present invention and core concept thereof; , for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention simultaneously.
Claims (3)
1. the system of the digital audio processing of an intelligent television, is characterized in that, comprising:
Sound transducer, loud speaker, A/D converter, sensor model, bit distributor, mpeg encoder, various audio decoder and control circuit form, wherein:
Sound transducer, for being responsible for the sound collection of digital television terminal user, generates the speech simulation signal, passes to A/D converter;
Loud speaker is for playing sound;
It is digital signal by analog signal conversion that A/D converter is used for;
Sensor model is for guaranteeing that quantization noise is lower than audible threshold value;
Bit distributor is for estimating shield threshold value and take audio signal frequency spectrum energy and psychological model as according to carrying out allocation bit;
Mpeg encoder is for becoming to meet the audio-frequency information of mpeg standard by audio signal compression;
The MEPG decoder is for becoming encoding stream by the audio decompression of compression, so that D/A converter is converted to analog signal by digital signal.
2. will go the system of the digital audio processing of 1 described intelligent television as right, it is characterized in that, described A/D converter is for carrying out signal sampling, each sample being quantized, and the signal drawn is the digital signal of un-encoded.
3. the method for the digital audio processing of an intelligent television, is characterized in that, described method comprises:
Step 1, digital TV terminal client send natural sound, and audio sensor receives and be translated into analog signal;
Step 2, digital to analog converter are converted into digital signal by analog signal;
Step 3, audio coder become digital audio signal coding the audio-frequency information that meets certain standard under various control informations, then judge whether audio-frequency information is sent to memory device or digital interface, if just proceed to step 6, no person judges whether to forward to multiplexer, if forward step 4 to, otherwise just abandon;
Step 4, multiplexer are sent the compressed audio information received, and have buffer to preserve waiting message;
Step 5, buffer are issued demultiplexer by the information received and are decomposited encoding stream;
Step 6, digital interface judgement have or not digital device request audio-frequency information, have with regard to audio reception and send digital device to, and no person is data streams not;
Step 7, decoder receive encoding stream, by its decompress(ion), and the reduction audio signal;
Step 8, D/A converter receive digital audio and video signals, and are translated into analog signal, pass to the equipment of raising one's voice accordingly or interface.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310391397.7A CN103491428A (en) | 2013-08-31 | 2013-08-31 | System and method for processing digital audio of smart television |
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| CN201310391397.7A CN103491428A (en) | 2013-08-31 | 2013-08-31 | System and method for processing digital audio of smart television |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5473366A (en) * | 1992-11-17 | 1995-12-05 | Canon Kabushiki Kaisha | Television-telephone apparatus having a message-keeping function and an automatic response transmission function |
| CN201699838U (en) * | 2010-03-31 | 2011-01-05 | 青岛海信电器股份有限公司 | Network television |
| CN102668569A (en) * | 2009-12-24 | 2012-09-12 | 索尼公司 | Device, method, and program for image processing |
-
2013
- 2013-08-31 CN CN201310391397.7A patent/CN103491428A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5473366A (en) * | 1992-11-17 | 1995-12-05 | Canon Kabushiki Kaisha | Television-telephone apparatus having a message-keeping function and an automatic response transmission function |
| CN102668569A (en) * | 2009-12-24 | 2012-09-12 | 索尼公司 | Device, method, and program for image processing |
| CN201699838U (en) * | 2010-03-31 | 2011-01-05 | 青岛海信电器股份有限公司 | Network television |
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