CN202102715U - Multi-carrier real-time play controlling system for audio media - Google Patents
Multi-carrier real-time play controlling system for audio media Download PDFInfo
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- CN202102715U CN202102715U CN2011201803199U CN201120180319U CN202102715U CN 202102715 U CN202102715 U CN 202102715U CN 2011201803199 U CN2011201803199 U CN 2011201803199U CN 201120180319 U CN201120180319 U CN 201120180319U CN 202102715 U CN202102715 U CN 202102715U
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Abstract
The utility model relates to an audio play controlling system, particularly relates to and discloses a multi-carrier real-time play controlling system for audio media. The multi-carrier real-time play controlling system comprises an audio data register which is sequentially connected with a decoding unit, a resampling unit and a lowpass filtering unit; and the output end of the lowpass filtering unit is connected with a PCM (Pulse-Code Modulation) data register, and the PCM data register is also connected with an index generating unit and a play unit. A play controlling unit is connected between the PCM data register and the play unit. In the multi-carrier real-time play controlling system, an index system is set up by audio frequencies, and the play controlling environment can be designed and updated, so as to meet the requirements for real-time play controlling of broadcasting and performance equipment, realize the fast real-time play controlling of audio coding and decoding, realize the skip and cut-in of an audio file fast, and realize the natural play controlling of various audio files.
Description
Technical field
The utility model relates to a kind of audio frequency broadcast control system, the real-time broadcast control system of particularly a kind of audio frequency media multichip carrier.
Background technology
In the Internet multimedia application, various audio formats have obtained using widely.In the multimedia application of voice frequency electronics, because this restriction on hardware of its equipment, make traditional audio/video encoding/decoding technology displaying audio file real-time.Therefore, need characteristics and a characteristic, the code/decode format of audio frequency is optimized and transforms, make it be fit to application demand real-time to broadcasting and performance type audio electronics terminal.
Summary of the invention
Exist multiple audio format incompatible to prior art audio frequency broadcast control system; Can't carry out the defective that quick real-time is play; The utility model provides a kind of compatibility multiple memory carrier, improves the storage of medium and the real-time broadcast control system of audio frequency media multichip carrier of propagation efficiency.
For realizing the foregoing invention purpose, the utility model adopts following technical scheme:
The real-time broadcast control system of audio frequency media multichip carrier; Comprise audio data buffer; Described audio data buffer is connected with decoding unit, resampling unit, low-pass filter unit successively; The output terminal of low-pass filter unit is connected with the PCM data buffer, and the PCM data buffer also is connected with index generation unit, broadcast unit.Simulated audio signal in the audio data buffer is through decoding unit decodes, and the resampling unit carries out discrete sampling, after low-pass filter unit carries out filtering, forms audio digital signals, enters into the PCM data buffer and stores.The index generation unit extracts audio digital signals and sets up index from the PCM data buffer, broadcast unit is realized the quick real-time Broadcast Control of audio coding decoding according to index.
As preferably, be connected with playing control unit between described PCM data buffer and the broadcast unit.Playing control unit is controlled broadcast unit, but Rapid Realization is jumped and inter-cutting audio files real-time each audio file of seamless Broadcast Control.
The real-time broadcast control system of audio frequency media multichip carrier of the utility model is set up directory system through audio frequency; The Broadcast Control environment is designed and upgrades; Make it can satisfy broadcasting and performance equipment to the demand of real-time Broadcast Control; Realize the quick real-time Broadcast Control of audio coding decoding, Rapid Realization is jumped and inter-cutting audio files, can real-time each audio file of seamless Broadcast Control.
Description of drawings
Fig. 1 is the structural representation of the real-time broadcast control system embodiment of the described audio frequency media multichip carrier of the utility model.
Fig. 2 is the workflow diagram of the real-time broadcast control system embodiment of the described audio frequency media multichip carrier of utility model.
Specific embodiment
Below in conjunction with accompanying drawing 1,2 and embodiment the utility model is described in further detail:
The real-time broadcast control system of audio frequency media multichip carrier; As shown in Figure 1; Comprise audio data buffer 1; Audio data buffer 1 is connected with decoding unit 2, resampling unit 3, low-pass filter unit 4 successively, and the output terminal of low-pass filter unit 4 is connected with PCM data buffer 6, and PCM data buffer 6 also is connected with index generation unit 5, broadcast unit 7.Be connected with playing control unit 8 between PCM data buffer 6 and the broadcast unit 7.
Simulated audio signal in the audio data buffer 1 is through decoding unit 2 decodings; Resampling unit 3 carries out discrete sampling (sampling rate is fixed as 44.1KSam/s); After low-pass filter unit 4 carries out filtering, form audio digital signals, enter into 6 storages of PCM data buffer.Index generation unit 5 extracts audio digital signals and sets up index from PCM data buffer 6, the quick real-time Broadcast Control of audio coding decoding is realized in playing control unit 8 controls playing unit 7 according to index.
The corresponding index file of each audio file, described audio index file layout is:
● totalframes: this audio file totalframes;
● average frame length: the average frame length of audio file, for the audio file of cbr (constant bit rate), frame length is more or less the same; The variable code rate audio file, frame length changes greatly, is used for retrieving sooner next index frame position;
● reference position ..., the n frame position: every frame synchronization position, press position in the file;
● frame time stabs: by 44.1K every frame time of counting setting p.s..
This index file form reduces the index file size greatly, can reduce the internal memory reserves and reach the access time to external memory storage.
As shown in Figure 2, be the workflow diagram of the real-time broadcast control system embodiment of the described audio frequency media multichip carrier of the utility model, through to updating data in the PCM data buffer 6 with read, sound signal is carried out real-time Broadcast Control.
Claims (2)
1. the real-time broadcast control system of audio frequency media multichip carrier; Comprise audio data buffer (1); It is characterized in that: described audio data buffer (1) is connected with decoding unit (2), resampling unit (3), low-pass filter unit (4) successively; The output terminal of low-pass filter unit (4) is connected with PCM data buffer (6), and PCM data buffer (6) also is connected with index generation unit (5), broadcast unit (7).
2. the real-time broadcast control system of audio frequency media multichip carrier according to claim 1 is characterized in that: be connected with playing control unit (8) between described PCM data buffer (6) and the broadcast unit (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201803199U CN202102715U (en) | 2011-05-31 | 2011-05-31 | Multi-carrier real-time play controlling system for audio media |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201803199U CN202102715U (en) | 2011-05-31 | 2011-05-31 | Multi-carrier real-time play controlling system for audio media |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202102715U true CN202102715U (en) | 2012-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011201803199U Expired - Fee Related CN202102715U (en) | 2011-05-31 | 2011-05-31 | Multi-carrier real-time play controlling system for audio media |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106293681A (en) * | 2015-06-13 | 2017-01-04 | 龙岩市新罗区智电电子厂 | Automatically update the public address system of music |
| CN106528040A (en) * | 2016-11-02 | 2017-03-22 | 福建星网视易信息系统有限公司 | Method and apparatus for improving audio quality of android device |
| CN108769786A (en) * | 2018-05-25 | 2018-11-06 | 网宿科技股份有限公司 | A kind of method and apparatus of synthesis audio and video data streams |
-
2011
- 2011-05-31 CN CN2011201803199U patent/CN202102715U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106293681A (en) * | 2015-06-13 | 2017-01-04 | 龙岩市新罗区智电电子厂 | Automatically update the public address system of music |
| CN106293681B (en) * | 2015-06-13 | 2020-04-10 | 福建出彩教育科技有限公司 | Broadcasting device capable of automatically updating music |
| CN106528040A (en) * | 2016-11-02 | 2017-03-22 | 福建星网视易信息系统有限公司 | Method and apparatus for improving audio quality of android device |
| CN108769786A (en) * | 2018-05-25 | 2018-11-06 | 网宿科技股份有限公司 | A kind of method and apparatus of synthesis audio and video data streams |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120104 Termination date: 20170531 |
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| CF01 | Termination of patent right due to non-payment of annual fee |