CN104506932B - A kind of audio transmission control system and control method - Google Patents
A kind of audio transmission control system and control method Download PDFInfo
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- CN104506932B CN104506932B CN201410729938.7A CN201410729938A CN104506932B CN 104506932 B CN104506932 B CN 104506932B CN 201410729938 A CN201410729938 A CN 201410729938A CN 104506932 B CN104506932 B CN 104506932B
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 54
- 238000012545 processing Methods 0.000 claims abstract description 121
- 230000005236 sound signal Effects 0.000 claims abstract description 88
- 230000005611 electricity Effects 0.000 claims description 3
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/439—Processing of audio elementary streams
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/60—Receiver circuitry for the reception of television signals according to analogue transmission standards for the sound signals
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Circuit For Audible Band Transducer (AREA)
Abstract
The present invention discloses a kind of audio transmission control system and control method, and the system includes：Whether signal judging unit, the audio-video signal for being inputted to input source need encoding and decoding to judge, audio-video signal otherwise are directly output into interface selecting unit；It is to export audio-video signal to audio frequency and video process chip；Audio frequency and video process chip, for being exported after carrying out encoding and decoding to the audio-video signal of input to interface selecting unit；Interface selecting unit, for receiving audio-video signal and selecting different internal interfaces to export to input processing chip according to media formats；Input processing chip, audio signal to sound processing chip is sent by I2S for separating audio signal from the audio-video signal of reception；Sound processing chip, for being exported after handling the audio signal of transmission through loudspeaker.The source of sound that this audio transmission control system of the present invention can input to different input sources exports, and realize audio takes into account processing.
Description
Technical field
The present invention relates to electronic product audio transmission field, and in particular to a kind of audio transmission control system and controlling party
Method.
Background technology
With the development of electronic product, integrated level requires more and more higher, only supports outside input audio signal or only props up
The growth requirement that the audio signal locally decoded can not meet electronic product is held, with head-mounted display apparatus (Head
Mount Display, abbreviation HMD) exemplified by, existing head-mounted display apparatus HMD is relatively simple in the form of audio input source,
This be due to head-mounted display apparatus sound intermediate frequency input source it is different, processing mode is different be difficult accomplish audio take into account place
Reason, it is thus impossible to which the defects of taking into account Multi-audio-frequency input source limits the development of electronic product to a certain extent.
The content of the invention
The invention provides a kind of audio transmission control system and control method, to solve existing electronic product due to audio
Input source is different and processing mode difference so as to limit electronic product development the problem of.
To reach above-mentioned purpose, the technical proposal of the invention is realized in this way：
According to an aspect of the invention, there is provided a kind of audio transmission control system, the system include：Signal judges single
Member, audio frequency and video process chip, interface selecting unit, input processing chip and sound processing chip；
Whether signal judging unit, the audio-video signal for being inputted to input source need encoding and decoding to judge, if
Encoding and decoding are not needed, then audio-video signal are directly output to interface selecting unit；If necessary to encoding and decoding, then audio frequency and video are believed
Number output is to audio frequency and video process chip；
Audio frequency and video process chip, list is selected for output to interface after carrying out encoding and decoding processing to the audio-video signal of input
Member；
Interface selecting unit, the audio-video signal and root exported for reception signal judging unit and audio frequency and video process chip
Different internal interfaces is selected to export to input processing chip according to the media formats of audio-video signal；
Input processing chip, for the audio-video signal of receiving interface selecting unit output, from the audio-video signal of reception
In separate audio signal, audio signal is sent to sound processing chip by integrated circuit built-in audio bus I2S；
Sound processing chip, the audio signal for being transmitted to input processing chip are defeated by loudspeaker after handling
Go out.
Alternatively, sound processing chip, it is additionally operable to lead to when needing and carrying out input source sound control or sound passback
Microphone collection audio signal is crossed, and the audio signal of collection is transferred to micro- place by integrated circuit built-in audio bus I2S
Manage device MCU；
Whether Micro-processor MCV, the audio signal for being transmitted to sound processing chip need encoding and decoding to judge, such as
Fruit does not need encoding and decoding, then the audio signal is received and dispatched into module by bluetooth directly returns to input source；If necessary to encoding and decoding,
The audio signal is then converted into usb data and audio frequency and video process chip is sent to by usb signal line；
Audio frequency and video process chip, it is additionally operable to after carrying out encoding and decoding processing to the usb data of microprocessor transmission, to input source
Carry out sound control or sound passback.
Alternatively, Micro-processor MCV, it is additionally operable to directly receive need not compiling for input source input by bluetooth transmitting-receiving module
The audio signal of decoding, and sound processing chip is sent to by integrated circuit built-in audio bus I2S；
Sound processing chip, it is additionally operable to defeated by loudspeaker after handling the audio signal of Micro-processor MCV transmission
Go out.
Alternatively, the system includes：
For the internal storage interface for the audio-video signal for needing encoding and decoding for receiving internal storage input；
And/or the WIFI interface of the audio-video signal for needing encoding and decoding for receiving input source input；
And/or the HDMI HDMI signals for not needing encoding and decoding inputted for receiving input source
HDMI；
And/or for receiving the mobile terminal high-definition audio and video standard interface MHL letters for not needing encoding and decoding of input source input
Number MHL interface.
Alternatively, connected between interface selecting unit and input processing chip by cable, cable include HDMI signal wires,
MHL signal wires and usb signal line.
According to another aspect of the present invention, there is provided a kind of audio transmission control method, this method include：
Whether encoding and decoding are needed to judge the audio-video signal that input source inputs by signal judging unit, if be not required to
Encoding and decoding are wanted, then audio-video signal are directly output to interface selecting unit；It is if necessary to encoding and decoding, then audio-video signal is defeated
Go out to audio frequency and video process chip；
Exported after carrying out encoding and decoding processing to the audio-video signal of input by audio frequency and video process chip to interface selecting unit；
The audio-video signal and basis exported by interface selecting unit reception signal judging unit and audio frequency and video process chip
The media formats of audio-video signal select different internal interfaces to export to input processing chip；
The audio-video signal exported by input processing chip receiving interface selecting unit, is shelled from the audio-video signal of reception
Audio signal is separated out, audio signal is sent to sound processing chip by integrated circuit built-in audio bus I2S；
The audio signal transmitted by sound processing chip to input processing chip is exported after handling by loudspeaker.
Alternatively, when the input source of the audio-video signal decoded to needs carries out sound control or sound returns, side
Method also includes：
Sound processing chip is additionally operable to gather audio signal by microphone, and the audio signal of collection is passed through into integrated electricity
Path built-in audio-frequency bus I2S is transferred to Micro-processor MCV；
Whether encoding and decoding are needed to judge the audio signal that sound processing chip transmits by Micro-processor MCV, if
Encoding and decoding are not needed, then the audio signal is received and dispatched into module by bluetooth directly returns to input source；If necessary to encoding and decoding, then
The audio signal is converted into usb data and audio frequency and video process chip is sent to by usb signal line；
By audio frequency and video process chip, after the usb data progress encoding and decoding processing of microprocessor transmission, input source is carried out
Sound control carries out sound passback.
Alternatively, this method also includes：
The audio for not needing encoding and decoding that input source input is directly received by bluetooth transmitting-receiving module by Micro-processor MCV is believed
Number, and sound processing chip is sent to by integrated circuit built-in audio bus I2S；
The audio signal that sound processing chip transmits to Micro-processor MCV is exported after handling by loudspeaker.
Alternatively, this method also includes：Encoding and decoding are needed by what internal storage interface internal storage inputted
Audio-video signal；
And/or the audio-video signal for needing encoding and decoding of input source input is received by WIFI interface；
And/or the HDMI for not needing encoding and decoding of input source input is received by HDMI
HDMI signals；
And/or the mobile terminal high-definition audio and video standard for not needing encoding and decoding inputted by MHL interface reception input source connects
Mouth MHL signals.
Alternatively, will be connected between interface selecting unit and input processing chip by cable, cable includes HDMI signals
Line, MHL signal wires and usb signal line.
Technical scheme, for input source input need encoding and decoding audio-video signal and do not need encoding and decoding
Audio-video signal judged, it is necessary to be transmitted to interface selecting unit after the carry out encoding and decoding processing of encoding and decoding, solution need not be compiled
Code is directly transmitted to interface selecting unit and selects different internal interfaces to export to input processing chip by interface selecting unit,
Audio signal is separated from the audio-video signal of reception through input processing chip, audio signal is sent to by I2S buses
Sound processing chip；Exported after being handled by sound processing chip the audio signal of transmission by loudspeaker.Realize both
Support the audio signal of local input source input to support the function of the audio signal of external input sources input again, efficiently solve not
The problem of audio signal inputted with audio input source is difficult to take into account processing, enrich the application scenarios of electronic product.
Brief description of the drawings
Fig. 1 is a kind of block diagram for audio transmission control system that one embodiment of the invention provides；
Fig. 2 is a kind of block diagram for audio transmission control system that one embodiment of the invention provides；
Fig. 3 is a kind of block diagram for head-mounted display apparatus that one embodiment of the invention provides；
Fig. 4 is a kind of flow chart for audio transmission control method that one embodiment of the invention provides.
Embodiment
The present invention core concept be：The sound of multiple input sources input is supported for wearing the electronic products such as class in the prior art
It can not accomplish to take into account the problem of processing is so as to constrain development and the application scenarios of wearing the electronic products such as class during frequency signal, to defeated
Enter source input need encoding and decoding audio-video signal and do not need encoding and decoding audio-video signal judged, it is necessary to encoding and decoding
Progress encoding and decoding processing after be transmitted to interface selecting unit, do not need encoding and decoding to be directly transmitted to interface selecting unit and by interface
Selecting unit selects different internal interfaces to export to input processing chip, the audio-video signal through input processing chip from reception
In separate audio signal, audio signal is sent to sound processing chip by I2S buses；By sound processing chip to transmission
Audio signal handled after exported by loudspeaker.The audio signal for realizing different audio input source inputs can be comprehensive
Take into account, widened the application for wearing the electronic products such as class.
In one embodiment of the invention, there is provided a kind of audio transmission control system, Fig. 1 are one implementation of the present invention
A kind of block diagram for audio transmission control system that example provides, referring to Fig. 1, the audio transmission control system 100 includes：Signal judges
Unit 110, audio frequency and video process chip 120, interface selecting unit 130, input processing chip 140 and sound processing chip 150；
Whether signal judging unit 110, the audio-video signal for being inputted to input source need encoding and decoding to judge, such as
Fruit does not need encoding and decoding, then audio-video signal is directly output into interface selecting unit 130；If necessary to encoding and decoding, then by sound
Vision signal is exported to audio frequency and video process chip 120；
Audio frequency and video process chip 120, selected for output to interface after carrying out encoding and decoding processing to the audio-video signal of input
Select unit 130；
Interface selecting unit 130, the sound exported for reception signal judging unit 110 and audio frequency and video process chip 120 regard
Frequency signal simultaneously selects different internal interfaces to export to input processing chip 140 according to the media formats of audio-video signal；
Input processing chip 140, the audio-video signal exported for receiving interface selecting unit 130, is regarded from the sound of reception
Audio signal is separated in frequency signal, audio signal is sent to acoustic processing core by integrated circuit built-in audio bus I2S
Piece 150；
Sound processing chip 150, the audio signal for being transmitted to input processing chip 140 handle after by raising one's voice
Device exports.
Thus, this audio transmission control system of the invention, the sound that different audio frequency and video input sources inputs can be directed to
Vision signal plays output after being handled respectively, can take into account the audio or audio frequency and video letter of the input of different audio-video input source
Number so that the application scenarios of electronic product are more abundant.User can be defeated according to current use environment unrestricted choice audio frequency and video
Enter source, improve the usage experience of user.
Fig. 2 is a kind of block diagram for audio transmission control system that one embodiment of the invention provides, referring to Fig. 2, at sound
Chip 150 is managed, is additionally operable to gather audio letter by microphone when needing to carry out input source sound control or sound passback
Number, and the audio signal of collection is transferred to Micro-processor MCV by integrated circuit built-in audio bus I2S；
Whether Micro-processor MCV, the audio signal for being transmitted to sound processing chip need encoding and decoding to judge, such as
Fruit does not need encoding and decoding, then the audio signal is received and dispatched into module by bluetooth directly returns to input source；If necessary to encoding and decoding,
The audio signal is then converted into usb data and audio frequency and video process chip 120 is sent to by usb signal line；
Audio frequency and video process chip 120, it is additionally operable to after carrying out encoding and decoding processing to the usb data of microprocessor transmission, to defeated
Enter source and carry out sound control or sound passback.
In the present embodiment, Micro-processor MCV, it is additionally operable to directly receive input source input not by bluetooth transmitting-receiving module
The audio signal of encoding and decoding is needed, and sound processing chip 150 is sent to by integrated circuit built-in audio bus I2S；
Sound processing chip 150, it is additionally operable to pass through loudspeaker after handling the audio signal of Micro-processor MCV transmission
Output.
Referring to Fig. 2, in the present embodiment, the system includes：Encoding and decoding are needed for receive internal storage input
The internal storage interface of audio-video signal；
And/or the WIFI interface of the audio-video signal for needing encoding and decoding for receiving input source input；
And/or the HDMI HDMI signals for not needing encoding and decoding inputted for receiving input source
HDMI；
And/or for receiving the mobile terminal high-definition audio and video standard interface MHL letters for not needing encoding and decoding of input source input
Number MHL interface.
In the present embodiment, regarded from the audio-video signal of internal storage interface input and by the sound of WIFI interface input
Frequency signal is all the audio-video signal for needing to decode.Internal storage can be SD card, due to whether from internal storage SD
It is all desirable that the audio-video signal that audio-video signal still obtains input source input by WIFI wireless transmission methods is read in card
Encoding and decoding, i.e., local encoding and decoding, thus this kind of input source are carried out to audio-video signal by audio frequency and video process chip and are referred to as this
Ground input source.
The audio-video signal inputted from HDMI and MHL interface is all the audio-video signal for not needing encoding and decoding, including
The HDMI signals inputted by HDMI or the MHL inputted by mobile terminal high-definition audio and video standard interface
Signal.Due to electronic product, when transmitting audio-video signal, common format is HDMI and MHL, and the sound of this two classes input source input regards
Frequency signal electron product can identify, all not need encoding and decoding processing, but be directly inputted into interface selecting unit, be selected by interface
Select unit selects different interfaces to export according to signal medium form.So this kind of input source is referred to as external input sources.
In the present embodiment, connected between interface selecting unit and input processing chip by cable, cable includes HDMI
Signal wire, MHL signal wires and usb signal line.
Below to the course of work of this audio transmission control system of the invention by taking head-mounted display apparatus (HMD) as an example
It is specifically described.Fig. 3 is a kind of block diagram for head-mounted display apparatus that one embodiment of the invention provides；Referring to Fig. 3, one
As wear including processing unit (PU) and wearing unit (HMU) for display device.
Wherein, PU parts include：Internal storage device SD card, WIFI wireless modules, audio frequency and video process chip, interface selection
Unit, interface selecting unit are provided with HDMI input interfaces and MHL input interfaces, and the audio-video signal of HDMI forms passes through HDMI
Input interface is input in interface selecting unit, and the audio-video signal of MHL forms is input to interface selecting unit by MHL interface
In.
HMU parts include：Input processing chip, sound processing chip, loudspeaker, microphone and Micro-processor MCV, and
The bluetooth transmitting-receiving module to be communicated with MCU.
Do not need the audio-video signal input of encoding and decoding and the HMD played by loudspeaker the course of work is：At audio frequency and video
Reason chip reads audio-video signal from local memory device SD card and be converted to after encoding and decoding processing the sound of HDMI forms
Vision signal is exported to interface selecting unit；Or audio frequency and video process chip is wirelessly transferred module with WIFI wireless parties by WIFI
Formula receives the audio-video signal of input source input and be converted to after encoding and decoding processing the audio-video signal output of HDMI forms
To interface selecting unit.The audio-video signal that interface selecting unit receives the HDMI forms that audio frequency and video process chip is sent is selected
Select, and exported by HDMI transmission signal lines through wearing the input interface of cell module to input processing chip.Input processing core
Piece separates audio signal in the audio-video signal received, and audio signal is passed through into integrated circuit built-in audio bus I2S
Output plays output after being handled by sound processing chip to sound processing chip by HMD loudspeaker.
Do not need the audio-video signal input of encoding and decoding and the HMD played by loudspeaker the course of work is：Interface selects
Unit directly receives the audio-video signal of HDMI forms or the audio-video signal of MHL forms that do not need encoding and decoding of input,
And select internal different interface to be transmitted processing the audio-video signal of the HDMI or MHL forms received, lead to respectively
Cross HDMI signal transmssion lines and MHL signal transmssion lines to export to input processing chip through input interface, input processing chip is by sound
Voice signal in vision signal is stripped out and sent through I2S buses to sound processing chip, is carried out by sound processing chip
Played and exported by loudspeaker after processing.
Broadcasting of the audio signal of different input source inputs in HMD is realized by said process to export, user can
By the input source input audio signal of wired connection or the audio-video signal sent by WIFI wireless mode input sources, also
It can be locally stored from HMD on card and read audio-video signal, can independently selected for user, improve user uses body
Test.
When needing to carry out input source sound control or sound passback, sound processing chip gathers sound by microphone
Frequency signal, and the audio signal of collection is transferred to Micro-processor MCV by integrated circuit built-in audio bus I2S；Microprocessor
Device MCU, whether encoding and decoding are needed to judge the audio signal of sound processing chip transmission, if not needing encoding and decoding,
The audio signal is received and dispatched into module by bluetooth and directly returns to input source；If necessary to encoding and decoding, then the audio signal is turned
It is changed to usb data and audio frequency and video process chip is sent to by usb signal line；Audio frequency and video process chip, microprocessor is transmitted
Usb data carry out encoding and decoding processing after, sound control or sound are carried out to input source and returned.In the present embodiment, when right
When needing the input source of the audio-video signal of encoding and decoding to carry out sound control and sound passback, corresponding units is worked in HMD
Cheng Shi：First, audio signal is gathered by HMD microphone, and the audio signal of collection is exported to sound processing chip, by
Sound processing chip is exported to HMD Micro-processor MCV after being handled through integrated circuit built-in audio bus I2S；Secondly,
MCU carries out processing to the audio signal received and is converted into usb data and by handling core with MCU and audio frequency and video respectively in HMD
The usb signal line of piece connection, the usb data after processing is exported to audio frequency and video process chip；Finally, audio frequency and video process chip connects
After the usb data for receiving MCU passbacks, dissection process is carried out to usb data, and different disposal is carried out according to the result of parsing.Sound
It can be following situations that video frequency processing chip, which carries out different disposal,：If the voice signal of the passback is sound control instruction, that
Corresponding control process is carried out according to the sound control instruction by audio frequency and video process chip.If the voice signal of the passback is
The audio communication carried out with input source, input source is returned to after being handled by audio frequency and video process chip.Here, input source can be with
It is to support that WIFI is wirelessly transferred mobile phone with sound input and output, the concrete application of such case can be certain in mobile phone
Individual application program and HMD interact communication, now, by audio frequency and video process chip by the Audio Signal Processing of the passback received
Require that the voice signal of form is sent to application program corresponding to the mobile phone by WIFI modes again into the application program is met.
When the input source of the audio-video signal to not needing encoding and decoding carries out sound control and sound returns, by sound
Manage chip and audio signal is gathered by microphone, Micro-processor MCV is transferred to by integrated circuit built-in audio bus I2S；It is micro-
After processor MCU is handled the audio signal that sound processing chip transmits, module is received and dispatched by bluetooth and returns to input source.
Difference of this bluetooth transmitting-receiving module with obtaining audio-video signal by WIFI is mainly the difference of application scenarios,
WIFI is mainly the audio-video signal source for receiving internet or mobile phone projection etc, need not substantially return voice signal.
During if passback demand, realized according to foregoing description.The application scenarios of Bluetooth wireless transmission mode are to connect HMD
To the handheld device such as mobile phone or tablet personal computer pad, called or used when the demand of mobile phone games voice, now
HMD can be regarded as to the bluetooth earphone for supporting Bluetooth transmission.
In other embodiments of the invention, HMD PU parts and HMU parts (i.e. interface selecting unit and input processing
Between chip) it can be connected by cable Cable, cable Cable includes HDMI signal wires, MHL signal wires and usb signal line.
In addition, present invention also offers a kind of audio transmission control method, Fig. 4 is one that one embodiment of the invention provides
The flow chart of kind audio transmission control method, referring to Fig. 4, this method includes：
Step S410, whether encoding and decoding are needed to sentence the audio-video signal that input source inputs by signal judging unit
It is disconnected, if not needing encoding and decoding, audio-video signal is directly output to interface selecting unit；If necessary to encoding and decoding, then will
Audio-video signal is exported to audio frequency and video process chip；
Step S420, exported after carrying out encoding and decoding processing to the audio-video signal of input by audio frequency and video process chip to interface
Selecting unit
Step S430, the audio frequency and video exported by interface selecting unit reception signal judging unit and audio frequency and video process chip are believed
Number and select different internal interface to export to input processing chip according to the media formats of audio-video signal；
Step S440, the audio-video signal exported by input processing chip receiving interface selecting unit, is regarded from the sound of reception
Audio signal is separated in frequency signal, audio signal is sent to acoustic processing core by integrated circuit built-in audio bus I2S
Piece；
Step S450, the audio signal transmitted by sound processing chip to input processing chip handle after by raising one's voice
Device exports.
In the present embodiment, when the input source of the audio-video signal decoded to needs carries out sound control or sound returns
When, method also includes：
Sound processing chip is additionally operable to gather audio signal by microphone, and the audio signal of collection is passed through into integrated electricity
Path built-in audio-frequency bus I2S is transferred to Micro-processor MCV；
Whether encoding and decoding are needed to judge the audio signal that sound processing chip transmits by Micro-processor MCV, if
Encoding and decoding are not needed, then the audio signal is received and dispatched into module by bluetooth directly returns to input source；If necessary to encoding and decoding, then
The audio signal is converted into usb data and audio frequency and video process chip is sent to by usb signal line；
By audio frequency and video process chip, after the usb data progress encoding and decoding processing of microprocessor transmission, input source is carried out
Sound control carries out sound passback.
In the present embodiment, this method also includes：
The audio for not needing encoding and decoding that input source input is directly received by bluetooth transmitting-receiving module by Micro-processor MCV is believed
Number, and sound processing chip is sent to by integrated circuit built-in audio bus I2S；
The audio signal that sound processing chip transmits to Micro-processor MCV is exported after handling by loudspeaker.
In the present embodiment, this method also includes：The needs inputted by internal storage interface internal storage
The audio-video signal of encoding and decoding；
And/or the audio-video signal for needing encoding and decoding of input source input is received by WIFI interface；
And/or the HDMI for not needing encoding and decoding of input source input is received by HDMI
HDMI signals；
And/or the mobile terminal high-definition audio and video standard for not needing encoding and decoding inputted by MHL interface reception input source connects
Mouth MHL signals.
In the present embodiment, will be connected between interface selecting unit and input processing chip by cable, cable includes
HDMI signal wires, MHL signal wires and usb signal line.
It should be noted that this audio transmission control method of the present invention, is and audio transmission described above control
System is corresponding, thus, audio transmission control method realizes that step may refer to the work of aforementioned audio transmission control system
Make the explanation of procedure division, will not be repeated here.
In summary, this audio transmission control system and control method of the invention can realize different input source inputs
Audio signal broadcasting output, taken into account different audio input sources.And user can be defeated by the input source of wired connection
Enter audio signal or audio-video signal is inputted by WIFI wireless modes, can also be deposited from the local of audio transmission control system
Audio-video signal is read in storage equipment, can independently be selected for user, improve the usage experience of user.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the scope of the present invention.It is all
Any modification, equivalent substitution and improvements made within the spirit and principles in the present invention etc., are all contained in protection scope of the present invention
It is interior.
Claims (10)
1. a kind of audio transmission control system, it is characterised in that the audio transmission control system includes：Signal judging unit,
Audio frequency and video process chip, interface selecting unit, input processing chip and sound processing chip；
Whether the signal judging unit, the audio-video signal for being inputted to input source need encoding and decoding to judge, if
Encoding and decoding are not needed, then audio-video signal are directly output to the interface selecting unit；If necessary to encoding and decoding, then sound is regarded
Frequency signal output is to the audio frequency and video process chip；
The audio frequency and video process chip, selected for output to the interface after carrying out encoding and decoding processing to the audio-video signal of input
Select unit；
The interface selecting unit, for receiving the audio frequency and video of the signal judging unit and audio frequency and video process chip output
Signal simultaneously selects different internal interfaces to export to the input processing chip according to the media formats of audio-video signal；
The input processing chip, for receiving the audio-video signal of the interface selecting unit output, from the sound of reception
Audio signal is separated in vision signal, audio signal is sent to the sound by integrated circuit built-in audio bus I2S
Process chip；
The sound processing chip, the audio signal for being transmitted to the input processing chip pass through loudspeaker after handling
Output.
2. audio transmission control system as claimed in claim 1, it is characterised in that
The sound processing chip, it is additionally operable to pass through microphone when needing and carrying out input source sound control or sound passback
Audio signal is gathered, and the audio signal of collection is transferred to Micro-processor MCV by integrated circuit built-in audio bus I2S；
Whether the Micro-processor MCV, the audio signal for being transmitted to the sound processing chip need encoding and decoding to sentence
It is disconnected, if not needing encoding and decoding, the audio signal is received and dispatched into module by bluetooth and directly returns to input source；If necessary to compile
Decoding, then be converted to usb data by the audio signal and be sent to the audio frequency and video process chip by usb signal line；
The audio frequency and video process chip, it is additionally operable to after carrying out encoding and decoding processing to the usb data of microprocessor transmission,
Sound control is carried out to input source or carries out sound passback.
3. audio transmission control system as claimed in claim 2, it is characterised in that the Micro-processor MCV, be additionally operable to pass through
Bluetooth transmitting-receiving module directly receives the audio signal for not needing encoding and decoding of input source input, and passes through integrated circuit built-in audio
Bus I2S sends the sound processing chip to；
The sound processing chip, it is additionally operable to after handling the audio signal of Micro-processor MCV transmission by raising one's voice
Device exports.
4. the audio transmission control system as any one of claim 1-3, it is characterised in that the system includes：
For the internal storage interface for the audio-video signal for needing encoding and decoding for receiving the internal storage input；
And/or the WIFI interface of the audio-video signal for needing encoding and decoding for receiving input source input；
And/or the HDMI of the HDMI HDMI signals for not needing encoding and decoding for receiving input source input
Interface；
And/or the mobile terminal high-definition audio and video standard interface MHL signals for not needing encoding and decoding inputted for receiving input source
MHL interface.
5. audio transmission control system as claimed in claim 4, it is characterised in that the interface selecting unit and the input
Connected between process chip by cable, the cable includes HDMI signal wires, MHL signal wires and usb signal line.
6. a kind of audio transmission control method, it is characterised in that this method includes：
Whether encoding and decoding are needed to judge the audio-video signal that input source inputs by signal judging unit, if need not compile
Decoding, then be directly output to interface selecting unit by audio-video signal；If necessary to encoding and decoding, then by audio-video signal export to
Audio frequency and video process chip；
Exported after carrying out encoding and decoding processing to the audio-video signal of input by audio frequency and video process chip to interface selecting unit；
Regarded by interface selecting unit reception signal judging unit and the audio-video signal of audio frequency and video process chip output and according to sound
The media formats of frequency signal select different internal interfaces to export to input processing chip；
The audio-video signal exported by input processing chip receiving interface selecting unit, is shelled from the audio-video signal of reception
Audio signal is separated out, audio signal is sent to sound processing chip by integrated circuit built-in audio bus I2S；
The audio signal transmitted by sound processing chip to the input processing chip is exported after handling by loudspeaker.
7. audio transmission control method as claimed in claim 6, it is characterised in that when the audio-video signal decoded to needs
When input source carries out sound control or sound passback, methods described also includes：
The sound processing chip is additionally operable to gather audio signal by microphone, and the audio signal of collection is passed through into integrated electricity
Path built-in audio-frequency bus I2S is transferred to Micro-processor MCV；
Whether encoding and decoding are needed to judge the audio signal that the sound processing chip transmits by the Micro-processor MCV,
If not needing encoding and decoding, the audio signal is received and dispatched into module by bluetooth and directly returns to input source；If necessary to compile solution
Code, then be converted to usb data by the audio signal and be sent to the audio frequency and video process chip by usb signal line；
By the audio frequency and video process chip, after the usb data progress encoding and decoding processing of microprocessor transmission, to defeated
Enter source to carry out sound control or carry out sound passback.
8. audio transmission control method as claimed in claim 7, it is characterised in that methods described also includes：
The audio signal for not needing encoding and decoding of input source input is directly received by bluetooth transmitting-receiving module by Micro-processor MCV,
And the sound processing chip is sent to by integrated circuit built-in audio bus I2S；
The audio signal transmitted by the sound processing chip to the Micro-processor MCV is defeated by loudspeaker after handling
Go out.
9. audio transmission control method as claimed in claim 7, it is characterised in that this method also includes：Pass through storage inside
The audio-video signal for needing encoding and decoding that internal storage described in device interface inputs；
And/or the audio-video signal for needing encoding and decoding of input source input is received by WIFI interface；
And/or the HDMI HDMI letters for not needing encoding and decoding of input source input are received by HDMI
Number；
And/or the mobile terminal high-definition audio and video standard interface for not needing encoding and decoding of input source input is received by MHL interface
MHL signals.
10. the audio transmission control method as any one of claim 6-9, it is characterised in that
It will be connected between the interface selecting unit and the input processing chip by cable, the cable includes HDMI signals
Line, MHL signal wires and usb signal line.
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| CN108600444A (en) * | 2018-04-16 | 2018-09-28 | 李苏平 | The method and multipath system of mobile terminal playing multipath audio signal based on input source material |
| CN109473081B (en) * | 2018-10-17 | 2023-11-21 | 歌尔科技有限公司 | Interface circuit, display method and display device |
| CN112312074B (en) * | 2019-08-02 | 2023-03-24 | 杭州海康威视数字技术股份有限公司 | Audio data output method and audio matrix |
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