CN104735512A - Audio data synchronization method, device and system - Google Patents
Audio data synchronization method, device and system Download PDFInfo
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- CN104735512A CN104735512A CN201510131186.9A CN201510131186A CN104735512A CN 104735512 A CN104735512 A CN 104735512A CN 201510131186 A CN201510131186 A CN 201510131186A CN 104735512 A CN104735512 A CN 104735512A
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- frame
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- aac
- eld
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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
- H04N21/4302—Content synchronisation processes, e.g. decoder synchronisation
- H04N21/4307—Synchronising the rendering of multiple content streams or additional data on devices, e.g. synchronisation of audio on a mobile phone with the video output on the TV screen
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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]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/233—Processing of audio elementary streams
- H04N21/2335—Processing of audio elementary streams involving reformatting operations of audio signals, e.g. by converting from one coding standard to another
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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
- H04N21/4398—Processing of audio elementary streams involving reformatting operations of audio signals
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
The invention discloses an audio data synchronization method, device and system in order to achieve rapid synchronization and take the quality of audio data into account. The method includes the steps that audio data played by a local machine are collected in real time in a PCM data format; framing is conducted on the collected PCM audio data to obtain PCM data frames; an AAC-ELD coding mode is adopted for coding the PCM data frames to obtain coded AAC-ELD data frames; the AAC-ELD data frames are sent to a server side.
Description
Technical field
The present invention relates to technical field of information transmission, particularly a kind of method, equipment and system of synchronized audio data.
Background technology
Along with the fast development of computer and network technologies, Multiple-screen integration becomes the development trend of present terminal, the voice data of a certain terminal of various terminal access can be supported whenever and wherever possible, thus the synchronous of voice data can be realized and share between the equipment such as television set, computer, mobile phone, panel computer.Such as, the voice data of mobile phone or panel computer is synchronized on television set, can be user-friendly.
In correlation technique, user can pass through HTTP (Hypertext Transfer Protocol, HTTP), FTP (File Transfer Protocol, file transfer protocol (FTP)) etc. agreement audio file is uploaded onto the server or provides audio file address to target side, target side is by using browser Website login displaying audio file, but this mode adds the complexity of file transfer and the pressure of the network bandwidth.Or can also the mode such as mail, bluetooth interactive audio file be passed through, but this sharing mode requires that both sides participate in just can completing simultaneously.As can be seen here, voice data conventional at present shares method can not realize i.e. Fast synchronization broadcasting, takes into account again high-quality and synchronously plays.
Summary of the invention
The invention provides a kind of method of synchronized audio data, equipment and system, in order to realize Fast synchronization and the object of the quality of voice data can be taken into account.
The invention provides a kind of method of synchronized audio data, be applied to client, comprising:
With the voice data that pulse code modulation PCM data format Real-time Collection the machine is play;
Sub-frame processing is carried out to the pcm audio data gathered, obtains PCM Frame;
Adopt AAC-ELD coded system to encode to described PCM Frame, obtain the AAC-ELD Frame after encoding;
By described AAC-ELD dataframe to server side.
In an embodiment of the present invention, the described pcm audio data to gathering carry out sub-frame processing, comprising:
In units of default sampling number, carry out sub-frame processing to the pcm audio data gathered, wherein, the pcm audio data often presetting sampling number are divided into a PCM Frame.
In an embodiment of the present invention, described employing AAC-ELD coded system is encoded to described PCM Frame, comprising:
Call at least one coding thread;
Described PCM Frame is submitted at least one coding thread described and carry out AAC-ELD coding.
In an embodiment of the present invention, described client and described server are positioned at same local area network (LAN).
The present invention also provides a kind of method of synchronized audio data, is applied to server, comprising:
Receive the AAC-ELD Frame from client, wherein, described AAC-ELD Frame carries out AAC-ELD coding by described client to PCM Frame and obtains;
Described AAC-ELD Frame is decoded, obtains described PCM Frame;
Play described PCM Frame.
The present invention also provides a kind of client of synchronized audio data, comprising:
Acquisition module, for the voice data play with pulse code modulation PCM data format Real-time Collection the machine;
Processing module, for carrying out sub-frame processing to the pcm audio data gathered, obtains PCM Frame;
Coding module, for adopting AAC-ELD coded system to encode to described PCM Frame, obtains the AAC-ELD Frame after encoding;
Sending module, for by described AAC-ELD dataframe to server side.
In an embodiment of the present invention, described processing module also for:
In units of default sampling number, carry out sub-frame processing to the pcm audio data gathered, wherein, the pcm audio data often presetting sampling number are divided into a PCM Frame.
In an embodiment of the present invention, described coding module also for:
Call at least one coding thread;
Described PCM Frame is submitted at least one coding thread described and carry out AAC-ELD coding.
The present invention also provides a kind of server of synchronized audio data, comprising:
Receiver module, for receiving the AAC-ELD Frame from least one client, wherein, described AAC-ELD Frame carries out AAC-ELD coding by least one client described to PCM Frame and obtains;
Decoder module, for decoding to described AAC-ELD Frame, obtains described PCM Frame;
Playing module, for playing described PCM Frame.
The present invention also provides a kind of system of synchronized audio data, comprising: at least one above-mentioned client and above-mentioned server.
Some beneficial effects of the embodiment of the present invention can comprise:
Embodiments provide the voice data real-time synchronization of client to the scheme of server, the voice data of PCM data format Real-time Collection the machine broadcasting is sentenced in client, subsequently sub-frame processing is carried out to the pcm audio data gathered, obtain PCM Frame, AAC-ELD coded system is adopted to encode to PCM Frame, obtain encode after AAC-ELD Frame, finally by AAC-ELD dataframe to server side.At server place, receive the AAC-ELD Frame from least one client, AAC-ELD Frame is decoded, obtain PCM Frame, finally play PCM Frame.Namely, the present invention passes through AAC-ELD coded system to audio data coding, the data volume of voice data can be reduced, thus the AAC-ELD Frame after sending coding can improve efficiency of transmission to during server, and AAC-ELD Frame can ensure the quality of voice data, thus realize by the voice data Fast synchronization of client to server, and the object of the quality of voice data can be taken into account.Further, the embodiment of the present invention can realize multiple user end to server synchronized audio data, meets the scene of multi-screen interactive, realizes client user's variation, personalized demand.
Other features and advantages of the present invention will be set forth in the following description, and, partly become apparent from specification, or understand by implementing the present invention.Object of the present invention and other advantages realize by structure specifically noted in write specification, claims and accompanying drawing and obtain.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for specification, together with embodiments of the present invention for explaining the present invention, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the flow chart of the method for the synchronized audio data being applied to client in one embodiment of the invention;
Fig. 2 is the flow chart of the method for the synchronized audio data being applied to server in one embodiment of the invention;
Fig. 3 is the schematic diagram that in one embodiment of the invention, in same local area network (LAN), multiple client and server multi-screen is shared;
Fig. 4 is the flow chart in conjunction with the method for the synchronized audio data of client and server in one embodiment of the invention;
Fig. 5 is the structural representation of the client of synchronized audio data in one embodiment of the invention; And
Fig. 6 is the structural representation of the server of synchronized audio data in one embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein is only for instruction and explanation of the present invention, is not intended to limit the present invention.
Figure 1 shows that in one embodiment of the invention the flow chart of the method for the synchronized audio data being applied to client, the method comprises the following steps S11-S14:
Step S11, the voice data play with PCM data format Real-time Collection the machine.
In this step, adopt PCM (Pulse Code Modulation, pulse code modulation) voice data is encoded, by sampling, quantification, coding three steps, continually varying analog signal is converted to digital coding, its maximum advantage is exactly that tonequality is good.
Step S12, carries out sub-frame processing to the pcm audio data gathered, obtains PCM Frame.
Step S13, adopts AAC-ELD coded system to encode to PCM Frame, obtains the AAC-ELD Frame after encoding.
In this step, AAC (Advanced Audio Coding, Advanced Audio Coding)-ELD (EnhancedLow Delay, enhanced low delay) is a codec that communicates based on ordinary audio codec AAC (being mainly used in main flow music download and steaming media platform).AAC-ELD with low-down bit rate, for video calling and phone provide the audio quality the same with CD.
Step S14, by AAC-ELD dataframe to server side.
Here, client and server can be positioned at same local area network (LAN), the scheme of synchronized audio data that now embodiment of the present invention provides can be applied in such scene: often there is a local area network (LAN) in places such as same office, studio, classrooms, a lot of client or terminal is had in this local area network (LAN) inside, synchronous sound in these clients or terminal is projected same server, meets the demand of multi-screen interactive.
Embodiments provide the voice data real-time synchronization of client to the scheme of server, the voice data of PCM data format Real-time Collection the machine broadcasting is sentenced in client, subsequently sub-frame processing is carried out to the pcm audio data gathered, obtain PCM Frame, AAC-ELD coded system is adopted to encode to PCM Frame, obtain encode after AAC-ELD Frame, finally by AAC-ELD dataframe to server side.At server place, receive the AAC-ELD Frame from least one client, AAC-ELD Frame is decoded, obtain PCM Frame, finally play PCM Frame.Namely, the present invention passes through AAC-ELD coded system to audio data coding, the data volume of voice data can be reduced, thus the AAC-ELD Frame after sending coding can improve efficiency of transmission to during server, and AAC-ELD Frame can ensure the quality of voice data, thus realize by the voice data Fast synchronization of client to server, and the object of the quality of voice data can be taken into account.Further, the embodiment of the present invention can realize multiple user end to server synchronized audio data, meets the scene of multi-screen interactive, realizes client user's variation, personalized demand.
In an alternative embodiment of the invention, step S12 carries out sub-frame processing to the pcm audio data gathered, the invention provides a kind of preferred scheme, in this scenario, in units of default sampling number, carry out sub-frame processing to the pcm audio data gathered, wherein, the pcm audio data often presetting sampling number are divided into a PCM Frame.Such as, be that unit is divided into PCM Frame one by one by pcm audio data according to 480 sampled points, here, adopting 480 sampled points to form a frame can be decided by AAC-ELD data frame length.
In an alternative embodiment of the invention, step S13 adopts AAC-ELD coded system to encode to PCM Frame, the invention provides a kind of preferred scheme, in this scenario, call at least one coding thread, PCM Frame is submitted at least one coding thread and carry out AAC-ELD coding.Here, adopting at least one coding thread to carry out AAC-ELD coding to PCM Frame can improve code efficiency, thus improves follow-up synchronous efficiency.
Accordingly, Figure 2 shows that in one embodiment of the invention the flow chart of the method for the synchronized audio data being applied to server, the method comprises the following steps S21-S23:
Step S21, receives the AAC-ELD Frame from least one client, and wherein, AAC-ELD Frame carries out AAC-ELD coding by least one client to PCM Frame and obtains.
Step S22, decodes to AAC-ELD Frame, obtains PCM Frame.
Step S23, plays PCM Frame.
In the present embodiment, server receives the AAC-ELD Frame from least one client, decodes, obtain PCM Frame to AAC-ELD Frame, finally plays PCM Frame.Because AAC-ELD Frame ensure that the quality of voice data, thus its to resolve the PCM Frame audio quality that obtains higher, meet the requirement of user to voice data quality.
The scheme of synchronized audio data provided by the invention is introduced below in conjunction with client and server.Be illustrated in figure 3 the schematic diagram that in one embodiment of the invention, in same local area network (LAN), multiple client and server multi-screen is shared.Be illustrated in figure 4 the flow chart in conjunction with the method for the synchronized audio data of client and server in one embodiment of the invention, the method comprises the following steps S41-S47:
The voice data that step S41, at least one client are play with PCM data format Real-time Collection the machine.
Step S42, at least one client, in units of default sampling number, are carried out sub-frame processing to the pcm audio data gathered, are obtained PCM Frame, and wherein, the pcm audio data often presetting sampling number are divided into a PCM Frame.
At least one coding thread of step S43, at least one client call, submits at least one coding thread and carries out AAC-ELD coding, obtain the AAC-ELD Frame after encoding by PCM Frame.
Step S44, at least one client by AAC-ELD dataframe to server side.
Step S45, server receive the AAC-ELD Frame from least one client, and wherein, AAC-ELD Frame carries out AAC-ELD coding by least one client to PCM Frame and obtains.
Step S46, server are decoded to AAC-ELD Frame, obtain PCM Frame.
Step S47, server play PCM Frame.
In the present embodiment, client sentences the voice data that PCM data format Real-time Collection the machine is play, subsequently sub-frame processing is carried out to the pcm audio data gathered, obtain PCM Frame, AAC-ELD coded system is adopted to encode to PCM Frame, obtain encode after AAC-ELD Frame, finally by AAC-ELD dataframe to server side.At server place, receive the AAC-ELD Frame from least one client, AAC-ELD Frame is decoded, obtain PCM Frame, finally play PCM Frame, thus achieve by the voice data real-time synchronization of client to server, and the object of the quality of voice data can be taken into account.
Corresponding to the method being applied to the synchronized audio data of client in above-described embodiment, present invention also offers a kind of client of synchronized audio data.Be illustrated in figure 5 the structural representation of the client of synchronized audio data in one embodiment of the invention, comprise:
Acquisition module 51, for the voice data play with pulse code modulation PCM data format Real-time Collection the machine;
Processing module 52, for carrying out sub-frame processing to the pcm audio data gathered, obtains PCM Frame;
Coding module 53, for adopting AAC-ELD coded system to encode to PCM Frame, obtains the AAC-ELD Frame after encoding;
Sending module 54, for by AAC-ELD dataframe to server side.
The above-mentioned client of the embodiment of the present invention: the voice data sentencing the broadcasting of PCM data format Real-time Collection the machine in client, subsequently sub-frame processing is carried out to the pcm audio data gathered, obtain PCM Frame, AAC-ELD coded system is adopted to encode to PCM Frame, obtain encode after AAC-ELD Frame, finally by AAC-ELD dataframe to server side.At server place, receive the AAC-ELD Frame from least one client, AAC-ELD Frame is decoded, obtain PCM Frame, finally play PCM Frame.Namely, the present invention passes through AAC-ELD coded system to audio data coding, the data volume of voice data can be reduced, thus the AAC-ELD Frame after sending coding can improve efficiency of transmission to during server, and AAC-ELD Frame can ensure the quality of voice data, thus realize by the voice data Fast synchronization of client to server, and the object of the quality of voice data can be taken into account.Further, the embodiment of the present invention can realize multiple user end to server synchronized audio data, meets the scene of multi-screen interactive, realizes client user's variation, personalized demand.
In an embodiment of the present invention, above-mentioned processing module 52 also for:
In units of default sampling number, carry out sub-frame processing to the pcm audio data gathered, wherein, the pcm audio data often presetting sampling number are divided into a PCM Frame.
In an embodiment of the present invention, above-mentioned coding module 53 also for:
Call at least one coding thread;
PCM Frame is submitted at least one coding thread and carry out AAC-ELD coding.
Corresponding to the method being applied to the synchronized audio data of server in above-described embodiment, present invention also offers a kind of server of synchronized audio data.Be illustrated in figure 6 the structural representation of the server of synchronized audio data in one embodiment of the invention, comprise:
Receiver module 61, for receiving the AAC-ELD Frame from least one client, wherein, AAC-ELD Frame carries out AAC-ELD coding by least one client to PCM Frame and obtains;
Decoder module 62, for decoding to AAC-ELD Frame, obtains PCM Frame;
Playing module 63, for playing PCM Frame.
The above-mentioned server of the embodiment of the present invention: server receives the AAC-ELD Frame from least one client, decodes, obtain PCM Frame to AAC-ELD Frame, finally plays PCM Frame.Because AAC-ELD Frame ensure that the quality of voice data, thus its to resolve the PCM Frame audio quality that obtains higher, meet the requirement of user to voice data quality.
Based on same inventive concept, the embodiment of the present invention also provides a kind of system of synchronized audio data, comprising: at least one above-mentioned client and above-mentioned server.
Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt the form of complete hardware embodiment, completely software implementation or the embodiment in conjunction with software and hardware aspect.And the present invention can adopt in one or more form wherein including the upper computer program implemented of computer-usable storage medium (including but not limited to magnetic disc store and optical memory etc.) of computer usable program code.
The present invention describes with reference to according to the flow chart of the method for the embodiment of the present invention, equipment (system) and computer program and/or block diagram.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or square frame.These computer program instructions can being provided to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the processor of computer or other programmable data processing device produce device for realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be loaded in computer or other programmable data processing device, make on computer or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computer or other programmable devices is provided for the step realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (10)
1. a method for synchronized audio data, is applied to client, it is characterized in that, comprising:
With the voice data that pulse code modulation PCM data format Real-time Collection the machine is play;
Sub-frame processing is carried out to the pcm audio data gathered, obtains PCM Frame;
Adopt AAC-ELD coded system to encode to described PCM Frame, obtain the AAC-ELD Frame after encoding;
By described AAC-ELD dataframe to server side.
2. method according to claim 1, is characterized in that, the described pcm audio data to gathering carry out sub-frame processing, comprising:
In units of default sampling number, carry out sub-frame processing to the pcm audio data gathered, wherein, the pcm audio data often presetting sampling number are divided into a PCM Frame.
3. method according to claim 1 and 2, is characterized in that, described employing AAC-ELD coded system is encoded to described PCM Frame, comprising:
Call at least one coding thread;
Described PCM Frame is submitted at least one coding thread described and carry out AAC-ELD coding.
4. method according to claim 1, is characterized in that, described client and described server are positioned at same local area network (LAN).
5. a method for synchronized audio data, is applied to server, it is characterized in that, comprising:
Receive the AAC-ELD Frame from least one client, wherein, described AAC-ELD Frame carries out AAC-ELD coding by least one client described to PCM Frame and obtains;
Described AAC-ELD Frame is decoded, obtains described PCM Frame;
Play described PCM Frame.
6. a client for synchronized audio data, is characterized in that, comprising:
Acquisition module, for the voice data play with pulse code modulation PCM data format Real-time Collection the machine;
Processing module, for carrying out sub-frame processing to the pcm audio data gathered, obtains PCM Frame;
Coding module, for adopting AAC-ELD coded system to encode to described PCM Frame, obtains the AAC-ELD Frame after encoding;
Sending module, for by described AAC-ELD dataframe to server side.
7. client according to claim 6, is characterized in that, described processing module also for:
In units of default sampling number, carry out sub-frame processing to the pcm audio data gathered, wherein, the pcm audio data often presetting sampling number are divided into a PCM Frame.
8. the client according to claim 6 or 7, is characterized in that, described coding module also for:
Call at least one coding thread;
Described PCM Frame is submitted at least one coding thread described and carry out AAC-ELD coding.
9. a server for synchronized audio data, is characterized in that, comprising:
Receiver module, for receiving the AAC-ELD Frame from least one client, wherein, described AAC-ELD Frame carries out AAC-ELD coding by least one client described to PCM Frame and obtains;
Decoder module, for decoding to described AAC-ELD Frame, obtains described PCM Frame;
Playing module, for playing described PCM Frame.
10. a system for synchronized audio data, is characterized in that, comprising: at least one client described in any one of claim 6-8 and server according to claim 9.
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| US20090099844A1 (en) * | 2007-10-16 | 2009-04-16 | Qualcomm Incorporated | Efficient implementation of analysis and synthesis filterbanks for mpeg aac and mpeg aac eld encoders/decoders |
| CN102016985A (en) * | 2008-03-04 | 2011-04-13 | 弗劳恩霍夫应用研究促进协会 | Mixing of input data streams and generation of an output data stream therefrom |
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Application publication date: 20150624 |