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Segmented decoding method for scrambled network audio MP3 (moving picture experts group audio layer 3) streams

A technology of network audio and decoding method, which is applied in the field of out-of-order and segmented decoding of network audio MP3 streams, which can solve problems such as incomplete decoding and inability to restore data streams, and achieve the effect of improving the receiving rate and decoding rate

Active Publication Date: 2014-12-10
NAT COMP NETWORK & INFORMATION SECURITY MANAGEMENT CENT +1
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AI Technical Summary

Problems solved by technology

The existing processing methods can only skip the out-of-order data stream, resulting in incomplete decoding and unable to restore the entire data stream

Method used

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  • Segmented decoding method for scrambled network audio MP3 (moving picture experts group audio layer 3) streams
  • Segmented decoding method for scrambled network audio MP3 (moving picture experts group audio layer 3) streams

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Embodiment Construction

[0017] The present invention will be further described in detail with reference to the accompanying drawings and embodiments.

[0018] The invention proposes an out-of-sequence segmentation decoding method based on network audio MP3 streams, with the purpose of correctly processing out-of-order audio MP3 streams to the greatest extent.

[0019] Such as figure 1 As shown, the out-of-order segmentation decoding method of the present invention specifically includes the following steps:

[0020] The first step is to capture and save audio MP3 packets from the network; including the following steps 1.1 to 1.3.

[0021] Step 1.1, capture the data packet transmitted by the network, when the data packet is an audio MP3 data packet, perform step 1.2, otherwise continue to capture the data packet.

[0022] Step 1.2, analyze whether the captured MP3 packet belongs to the audio stream data of a new session (session), if so, set up a cache for the new session, and enter step 1.3 to execu...

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Abstract

The invention provides a segmented decoding method for scrambled network audio MP3 (moving picture experts group audio layer 3) streams and relates to the technical field of processing of audio streams. The method includes: capturing audio MP3 data packets transmitted from a network, acquiring MP3 data frames, storing in caches according to position information, setting a cache for each session, and starting audio decoding when consecutive data packets reach an appointed size; adopting an FFmpeg technique for decoding of data blocks, modifying corresponding contexts during decoding, and enabling FFmpeg to continue decoding by means of disguising. An independent printed circuit board with a plurality of acceleration units is adopted for decoding, the acceleration units are implemented by means of the FFmpeg technique, and accordingly parallel decoding can be realized; no matter in which sequence the network audio MP3 streams are received, the audio streams can be spliced and decoded to the maximum extend by taking the audio frames of a fixed quantity as a unit according to the segmented decoding method which is supportive to parallel decoding of various data streams; by adoption of the segmented decoding method, available frame count receiving rate and decoding rate of the audio streams are increased.

Description

technical field [0001] The invention relates to the technical field of audio stream processing, in particular to an out-of-order segment decoding method for network audio MP3 streams. Background technique [0002] In the field of network audio MP3 stream processing, traditional processing schemes generally process audio streams sequentially. In actual application, due to the characteristics of P2P, segmented download and UDP protocol, out-of-order audio streams exist. Currently existing processing methods can only skip out-of-order data streams, resulting in incomplete decoding and unable to restore the entire data stream. Contents of the invention [0003] The object of the present invention is to correctly process out-of-sequence audio MP3 streams to the greatest extent, and proposes a network audio MP3 stream out-of-order segmentation decoding method, which performs maximum decoding through local buffering and segmentation processing. [0004] The out-of-order segment...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N21/439H04N21/443
Inventor 云晓春周游袁庆升谢铭包秀国周康成薛晨邹学强
Owner NAT COMP NETWORK & INFORMATION SECURITY MANAGEMENT CENT
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