CN109218758A - A kind of trans-coding system that supporting CC caption function and method - Google Patents
A kind of trans-coding system that supporting CC caption function and method Download PDFInfo
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- CN109218758A CN109218758A CN201811375803.XA CN201811375803A CN109218758A CN 109218758 A CN109218758 A CN 109218758A CN 201811375803 A CN201811375803 A CN 201811375803A CN 109218758 A CN109218758 A CN 109218758A
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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
- H04N21/236—Assembling of a multiplex stream, e.g. transport stream, by combining a video stream with other content or additional data, e.g. inserting a URL [Uniform Resource Locator] into a video stream, multiplexing software data into a video stream; Remultiplexing of multiplex streams; Insertion of stuffing bits into the multiplex stream, e.g. to obtain a constant bit-rate; Assembling of a packetised elementary stream
- H04N21/2368—Multiplexing of audio and video streams
-
- 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
- H04N21/236—Assembling of a multiplex stream, e.g. transport stream, by combining a video stream with other content or additional data, e.g. inserting a URL [Uniform Resource Locator] into a video stream, multiplexing software data into a video stream; Remultiplexing of multiplex streams; Insertion of stuffing bits into the multiplex stream, e.g. to obtain a constant bit-rate; Assembling of a packetised elementary stream
- H04N21/2362—Generation or processing of Service Information [SI]
-
- 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
- H04N21/434—Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream
- H04N21/4341—Demultiplexing of audio and video streams
-
- 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
- H04N21/434—Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream
- H04N21/4345—Extraction or processing of SI, e.g. extracting service information from an MPEG stream
-
- 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
- H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving MPEG packets from an IP network
- H04N21/4385—Multiplex stream processing, e.g. multiplex stream decrypting
Abstract
The present invention relates to a kind of trans-coding systems for supporting CC caption function and method, trans-coding system to specifically include that demultiplexer, and the TS flow data received is demultiplexed, and respectively obtains DTV CC data, ARIB CC data, Subtitle data and audio, video data；Storage unit is filtered, is connected with the demultiplexer, the DTV CC data, ARIB CC data, Subtitle data is filtered into storage respectively；Audio-video solution code storage unit, is connected with the demultiplexer, and the audio, video data is decoded and encodes and stores；Multiplexer is connected with the filtering storage unit and audio-video solution code storage unit respectively, all data of storage is multiplexed.Trans-coding system of the invention can support CC (DTV CC and ARIB CC) function, while meet the CC of two kinds of standards, improve the using effect of user.
Description
Technical field
The invention belongs to TV technologies, and in particular to a kind of trans-coding system for supporting CC caption function and method.
Background technique
CC:Closed Captioning, abbreviation CC, CC are a kind of closed captionings, user can autonomous either on or off, it is main
It is used to not hearing people's viewing of sound and understands programme content, such as hearing impaired people, or for some specific
Environment in, such as some extremely noisy or environment that must keep quite.DTV CC: U.S.Advanced Television committee member management consultant
The CC standard for the DTV that can be defined, wherein including two standards, respectively CEA-608 and CEA-708.ARIB CC: Japan
The CC standard that wireless industrial and commerce and trade federation define, the standard are also used by Brazil and other places.Subtitle:DVB
Subtitling format defined in Subtitle, DVB specification, for providing subtitle service in DVB digital television broadcasting.PTS:PTS
(Presentation Time Stamp), Presentation Time Stamp, this timestamp are used to tell when player should show
The data of this frame.
With the increasingly raising of people's living standard, the demand to the good experience sense of home audio-visual amusement has at double
Increase, this also facilitates the increasingly developed of digital TV Broadcasting Techniques, and nowadays, DTV has contained more and more function
Can, such as same program includes multichannel track, multichannel subtitle, CC function etc..Wherein, CC function has been got in foreign countries
Come more popular, the video of number of site and some TV programme have completely included CC function.Although TV programme are included
CC function, but present head end information collection and trans-coding system can not completely support the CC of two kinds of standards, in this way meeting
Leading to collected program still does not have CC data, and finally using the user of Web TV in this way is that can not enjoy this service.
Since CC function actually includes two kinds of standards, one is DTV CC, another is ARIB CC, so that transcoder is wanted
Support that CC function is a very complicated process, traditional transcoder is during realizing transcoding, at good method
The CC data in source code flow (TS stream) are managed, usual way often directly abandons the partial data, this can be to the entire sight of user
See that impression is had a greatly reduced quality, current transcoder all cannot completely support the CC of above two standard, result in terminal user's body
It tests bad.
Summary of the invention
In view of the deficiencies of the prior art, the present invention proposes a kind of trans-coding system for supporting CC caption function and methods, make
Trans-coding system can support CC (DTV CC and ARIB CC) function, while meet the CC of two kinds of standards, improve the use effect of user
Fruit.
In order to solve the above technical problems, the technical scheme adopted by the invention is as follows:
A kind of trans-coding system for supporting CC caption function, comprising:
Demultiplexer demultiplexes the TS flow data received, respectively obtain DTV CC data, ARIB CC data,
Subtitle data and audio, video data；
Storage unit is filtered, is connected with the demultiplexer, by the DTV CC data, ARIB CC data, Subtitle number
According to filtering storage respectively；
Audio-video solution code storage unit, is connected with the demultiplexer, and the audio, video data is decoded and encodes and stores；
Multiplexer is connected with the filtering storage unit and audio-video solution code storage unit respectively, by all numbers of storage
According to being multiplexed.
Further, the filtering storage unit includes: filter and memory, the filter and the demultiplexer
It is connected, the memory is connected with the filter and multiplexer respectively.
Further, the filtering storage unit further include: the first PTS packing device, respectively with filter and memory
It is connected, the DTV CC data obtained after filtering, ARIB CC data and Subtitle data is subjected to PTS packing, are included
DTV CC data, ARIB CC data and the Subtitle data of PTS are simultaneously stored.
Further, the audio-video solution code storage unit includes: the audio/video decoder being sequentially connected, audio-video volume
Code device and audio, video data memory, and the audio/video decoder is connected with the demultiplexer, the audio, video data is deposited
Reservoir is connected with the multiplexer.
Further, the audio-video solution code storage unit further include: the 2nd PTS packing device, respectively with audio-video
Encoder is connected with audio, video data memory, and the audio, video data obtained after coding is carried out PTS packing, is obtained comprising PTS
Coding after audio, video data after stored.
Further, further includes: PTS examine device, input terminal respectively with the memory and audio, video data memory
It is connected, output end is connected with the multiplexer, carries out validity checking to all data of storage and according to PTS Cahn-Ingold-Prelog sequence rule
It is sent to multiplexer after garbled data and carries out data-reusing.
Further, further includes: inlet flow receiving module, network protocol parsing module and the encapsulation format solution being sequentially connected
Module is analysed, and the encapsulation format parsing module is connected with the demultiplexer, successively carries out data to the TS flow data of input
It pulls, be sent to the demultiplexer after network protocol validity checking and parsing, encapsulation format validity checking and parsing.
Further, further includes: encapsulation format packetization module, network protocol packetization module and the output stream hair being sequentially connected
Module is sent, and the encapsulation format packetization module is connected with the multiplexer, the TS flow data obtained after multiplexing is successively carried out
Encapsulation format is packaged, network protocol is packaged and data are sent.
In another aspect of this invention, a kind of code-transferring method according to mentioned-above trans-coding system is proposed, including with
Lower step:
S1: the TS flow data received is demultiplexed, and respectively obtains DTV CC data, ARIB CC data, Subtitle number
According to and audio, video data；
S2: the DTV CC data, ARIB CC data, Subtitle data are filtered respectively and are packaged with PTS, are wrapped
DTV CC data, ARIB CC data and Subtitle data containing PTS are simultaneously stored；And the audio, video data is decoded
Coding and PTS are packaged, and are stored after the audio, video data after obtaining the coding comprising PTS；
S3: validity checking is carried out to all data of step S2 storage and according to PTS Cahn-Ingold-Prelog sequence rule garbled data；
S4: the data obtained after screening are sent to multiplexer and carry out data-reusing, obtain multiplexed TS flow data.
Further, further comprising the steps of S0: data pull is successively carried out to the TS flow data of input, network protocol is closed
The demultiplexer is sent to after method inspection and parsing, encapsulation format validity checking and parsing；Step S5: it is obtained to after multiplexing
To TS flow data be successively packaged format be packaged, network protocol be packaged and data send.
Beneficial effects of the present invention include at least: trans-coding system and code-transferring method of the invention enables trans-coding system to prop up
CC (DTV CC and ARIB CC) function is held, while meeting the CC of two kinds of standards, improves the using effect of user.
Detailed description of the invention
Fig. 1 is trans-coding system structural block diagram of the present invention.
Fig. 2 is trans-coding system data-reusing structural block diagram of the present invention.
Fig. 3 is that trans-coding system of the present invention inputs TS stream data structure block diagram.
Fig. 4 is that trans-coding system of the present invention exports TS stream data structure block diagram.
Specific embodiment
In order to make those skilled in the art more fully understand technical solution of the present invention, combined with specific embodiments below to this
Invention is described in further detail.The embodiments described below is exemplary, and for explaining only the invention, and cannot be understood
For limitation of the present invention.Particular technique or condition are not specified in embodiment, according to the literature in the art described skill
Art or condition are carried out according to product description.
According to an embodiment of the invention, the trans-coding system of the present invention for supporting CC caption function, specifically includes that demultiplexing
Device, filtering storage unit, audio-video solution code storage unit and multiplexer, wherein the filtering storage unit is demultiplexed with described
It is connected with device, the DTV CC data, ARIB CC data, Subtitle data is filtered into storage respectively；The audio-video solution is compiled
Code memory unit is connected with the demultiplexer, and the audio, video data is decoded and encodes and stores；The multiplexer respectively with
The filtering storage unit is connected with audio-video solution code storage unit, and all data of storage are multiplexed.
More specifically, Fig. 1 is trans-coding system structural block diagram of the present invention, shown referring to Fig.1, the demultiplexer, and being used for will
The TS flow data received is demultiplexed, and DTV CC data, ARIB CC data, Subtitle data and sound view are respectively obtained
Frequency evidence；It is understood that the audio, video data includes: audio data and video data.
According to an embodiment of the invention, the filtering storage unit includes: filter and memory, the filter and institute
It states demultiplexer to be connected, the memory is connected with the filter and multiplexer respectively.More specifically, shown in referring to Fig.1, this
Invention is respectively equipped with corresponding filter and memory for the DTV CC data, ARIB CC data and Subtitle data,
That is DTV CC data filter and DTV CC data storage, ARIB CC data filter and ARIB CC data storage,
Subtitle data filter and Subtitle data storage, the DTV CC data obtained for demultiplexing, ARIB CC
Data and Subtitle data are filtered and store respectively.
According to some embodiments of the present invention, Fig. 2 is trans-coding system data-reusing structural block diagram of the present invention, referring to Fig. 2 institute
Showing, filtering storage unit of the present invention further include: the first PTS packing device is connected with filter and memory respectively, incited somebody to action
DTV CC data, ARIB CC data and the Subtitle data obtained after filter carry out PTS packing, obtain the DTV CC comprising PTS
Data, ARIB CC data and Subtitle data are simultaneously stored, DTV CC data, ARIB CC data after being stored and
Subtitle data.
According to an embodiment of the invention, the audio-video solution code storage unit includes: to be sequentially connected shown in referring to Fig.1
Audio/video decoder, audio/video coder and audio, video data memory, and the audio/video decoder and the demultiplexing
Device is connected, and the audio, video data memory is connected with the multiplexer, and the audio/video decoder is for obtaining demultiplexing
Audio, video data be decoded, the audio/video coder is for re-starting coding, institute to decoded audio, video data
Audio, video data memory is stated for storing to the audio, video data after coding, and the audio, video data of the storage is sent
To the multiplexer.
According to some embodiments of the present invention, referring to shown in Fig. 2, the audio-video solution code storage unit further include: the
Two PTS packing devices, are connected with audio/video coder and audio, video data memory respectively, the audio-video number that will be obtained after coding
According to PTS packing is carried out, stored after the audio, video data after obtaining the coding comprising PTS.
According to some embodiments of the present invention, referring to shown in Fig. 2, further includes: PTS examines device, input terminal respectively with institute
It states memory to be connected with audio, video data memory, output end is connected with the multiplexer, closes all data of storage
Method inspection and according to be sent to after PTS Cahn-Ingold-Prelog sequence rule garbled data multiplexer carry out data-reusing.
According to some embodiments of the present invention, Fig. 3 is that trans-coding system of the present invention inputs TS stream data structure block diagram, referring to figure
Shown in 3, trans-coding system of the present invention further include: inlet flow receiving module, network protocol parsing module and the envelope being sequentially connected
Format parsing module is filled, and the encapsulation format parsing module is connected with the demultiplexer, mould is received by the inlet flow
Block successively carries out data pull to the TS flow data of input, carries out network protocol legitimacy by the network protocol parsing module
After checking and parse, being packaged format validity checking and parsing by the encapsulation format parsing module, it is sent to described
Demultiplexer carries out transcoding.
According to some embodiments of the present invention, Fig. 4 is that trans-coding system of the present invention exports TS stream data structure block diagram, referring to figure
Shown in 4, trans-coding system of the present invention further include: the encapsulation format packetization module that is sequentially connected, network protocol packetization module and
Output stream sending module, and the encapsulation format packetization module is connected with the multiplexer, is packaged mould by the encapsulation format
Block is packaged format to the TS flow data obtained after multiplexing and is packaged, again by network protocol packetization module progress network association
View is packaged, and carries out data transmission finally by the output stream sending module.
In another aspect of this invention, a kind of code-transferring method according to mentioned-above trans-coding system is proposed, it is specific to wrap
Include following steps:
S0: it is legal that data pull, network protocol validity checking and parsing, encapsulation format are successively carried out to the TS flow data of input
Property inspection and parsing after be sent to the demultiplexer；
S1: the TS flow data received is demultiplexed, and respectively obtains DTV CC data, ARIB CC data, Subtitle number
According to and audio, video data；
S2: the DTV CC data, ARIB CC data, Subtitle data are filtered respectively and are packaged with PTS, are wrapped
DTV CC data, ARIB CC data and Subtitle data containing PTS are simultaneously stored；And the audio, video data is decoded
Coding and PTS are packaged, and are stored after the audio, video data after obtaining the coding comprising PTS；
S3: validity checking is carried out to all data of step S2 storage and according to PTS Cahn-Ingold-Prelog sequence rule garbled data；It can manage
Solution, all data of the storage include above-mentioned: DTV CC data, ARIB CC data and Subtitle number comprising PTS
According to the audio, video data after, the coding comprising PTS；
S4: the data obtained after screening are sent to multiplexer and carry out data-reusing, obtain multiplexed TS flow data；
S5: format packing is successively packaged to the TS flow data obtained after multiplexing, network protocol is packaged and data are sent.
In conclusion trans-coding system and code-transferring method of the invention, enable trans-coding system to support CC (DTV CC and ARIB
CC) function, while meeting the CC of two kinds of standards, improve the using effect of user.
In the present invention unless specifically defined or limited otherwise, the terms such as term " connected ", " connection " should do broad sense reason
Solution, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connection, be also possible to electricity
Connection；It can be directly connected, the connection inside two elements or two can also be can be indirectly connected through an intermediary
The interaction relationship of element.For the ordinary skill in the art, above-mentioned term can be understood as the case may be
Concrete meaning in the present invention.
In the description of this specification, the description of reference term " some embodiments ", " embodiment " etc. means to combine the reality
It applies example or example particular features, structures, materials, or characteristics described is contained at least one embodiment of the present invention or example
In.In the present specification, schematic expression of the above terms need not be directed to identical embodiment or example.Moreover, retouching
The particular features, structures, materials, or characteristics stated can be tied in an appropriate manner in any one or more of the embodiments or examples
It closes.In addition, without conflicting with each other, those skilled in the art can be by different embodiments described in this specification
Or the feature of example and different embodiments or examples is combined.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant, at the same time, for those skilled in the art, the think of according to the application
Think, there will be changes in the specific implementation manner and application range.
Claims (10)
1. a kind of trans-coding system for supporting CC caption function characterized by comprising
Demultiplexer demultiplexes the TS flow data received, respectively obtain DTV CC data, ARIB CC data,
Subtitle data and audio, video data；
Storage unit is filtered, is connected with the demultiplexer, by the DTV CC data, ARIB CC data, Subtitle number
According to filtering storage respectively；
Audio-video solution code storage unit, is connected with the demultiplexer, and the audio, video data is decoded and encodes and stores；
Multiplexer is connected with the filtering storage unit and audio-video solution code storage unit respectively, by all numbers of storage
According to being multiplexed.
2. trans-coding system according to claim 1, which is characterized in that the filtering storage unit includes: filter and deposits
Reservoir, the filter are connected with the demultiplexer, and the memory is connected with the filter and multiplexer respectively.
3. trans-coding system according to claim 2, which is characterized in that the filtering storage unit further include: the first PTS is beaten
Packet device, is connected with filter and memory respectively, by the DTV CC data obtained after filtering, ARIB CC data and
Subtitle data carry out PTS packing, obtain DTV CC data, ARIB CC data and Subtitle data comprising PTS and go forward side by side
Row storage.
4. trans-coding system according to claim 3, which is characterized in that the audio-video solution code storage unit include: according to
Secondary connected audio/video decoder, audio/video coder and audio, video data memory, and the audio/video decoder with it is described
Demultiplexer is connected, and the audio, video data memory is connected with the multiplexer.
5. trans-coding system according to claim 4, which is characterized in that the audio-video solution code storage unit further include:
2nd PTS packing device is connected with audio/video coder and audio, video data memory respectively, the audio-video that will be obtained after coding
Data carry out PTS packing, are stored after the audio, video data after obtaining the coding comprising PTS.
6. trans-coding system according to claim 5, which is characterized in that further include: PTS examine device, input terminal respectively with
The memory is connected with audio, video data memory, and output end is connected with the multiplexer, carries out to all data of storage
Validity checking and according to be sent to after PTS Cahn-Ingold-Prelog sequence rule garbled data multiplexer carry out data-reusing.
7. trans-coding system according to claim 1, which is characterized in that further include: the inlet flow receiving module that is sequentially connected,
Network protocol parsing module and encapsulation format parsing module, and the encapsulation format parsing module is connected with the demultiplexer,
Data pull, network protocol validity checking and parsing, encapsulation format validity checking are successively carried out to the TS flow data of input
With the demultiplexer is sent to after parsing.
8. trans-coding system according to claim 1, which is characterized in that further include: the encapsulation format being sequentially connected is packaged mould
Block, network protocol packetization module and output stream sending module, and the encapsulation format packetization module is connected with the multiplexer, it is right
The TS flow data obtained after multiplexing is successively packaged format packing, network protocol is packaged and data are sent.
9. a kind of code-transferring method of trans-coding system according to claim 1 to 8, which is characterized in that including following
Step:
S1: the TS flow data received is demultiplexed, and respectively obtains DTV CC data, ARIB CC data, Subtitle number
According to and audio, video data；
S2: the DTV CC data, ARIB CC data, Subtitle data are filtered respectively and are packaged with PTS, are wrapped
DTV CC data, ARIB CC data and Subtitle data containing PTS are simultaneously stored；And the audio, video data is decoded
Coding and PTS are packaged, and are stored after the audio, video data after obtaining the coding comprising PTS；
S3: validity checking is carried out to all data of step S2 storage and according to PTS Cahn-Ingold-Prelog sequence rule garbled data；
S4: the data obtained after screening are sent to multiplexer and carry out data-reusing, obtain multiplexed TS flow data.
10. code-transferring method according to claim 9, which is characterized in that further comprising the steps of S0: to the TS fluxion of input
It is sent to according to successively progress data pull, network protocol validity checking and parsing, encapsulation format validity checking and after parsing
The demultiplexer；Step S5: to the TS flow data obtained after multiplexing be successively packaged format be packaged, network protocol be packaged and
Data are sent.
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| CN114302215A (en) * | 2021-12-29 | 2022-04-08 | 北京奕斯伟计算技术有限公司 | Video data stream decoding system, method, electronic device, and medium |
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| CN103248927A (en) * | 2013-05-15 | 2013-08-14 | 无锡北斗星通信息科技有限公司 | MIMO (multiple-input multiple-output)-type DVB-T(Digital Video Broadcasting-Terrestrial) set top box with caption processing function |
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| CN113938705A (en) * | 2020-07-13 | 2022-01-14 | 阿里巴巴集团控股有限公司 | Method, device, server, terminal equipment and system for video coding and decoding |
| CN114302215A (en) * | 2021-12-29 | 2022-04-08 | 北京奕斯伟计算技术有限公司 | Video data stream decoding system, method, electronic device, and medium |
| CN114302215B (en) * | 2021-12-29 | 2023-09-29 | 北京奕斯伟计算技术股份有限公司 | Video data stream decoding system, method, electronic device and medium |
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