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A method and device for realizing real-time conversion of latm AAC audio stream

An implementation method and technology of audio streaming, applied in speech analysis, selective content distribution, instruments, etc., can solve problems such as complex implementation

Active Publication Date: 2020-12-29
SHENZHEN STATE MICRO TECH CO LTD
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  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0006] When a general audio and video player processes the LATM AAC audio frame sequence in the real-time MPEG2-TS stream, it is based on the audio decoding library / framework that can natively support it. For example, the MacOs AudioQueue framework can only support audio frames in the ADTS AAC encapsulation format. If you need to be able to decode, you can only use a third-party decoding library to achieve it, which makes the implementation of the project complicated and may even incur additional costs

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  • A method and device for realizing real-time conversion of latm AAC audio stream
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  • A method and device for realizing real-time conversion of latm AAC audio stream

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Embodiment Construction

[0085] In order to make the objectives, features, and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts belong to the protection scope of the present invention.

[0086] The following are definitions or explanations of abbreviations and key terms:

[0087] Usb Dongle: A device that provides MPEG2-TS via a usb interface.

[0088] AudioQueue: MacX audio processing framework.

[0089] MPEG2-TS: MPEG2-TS is a transport stream for audio, video and data.

[0090] LATM: Low-overhead MPEG-4 Audio Transport Multiplex, a...

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Abstract

The invention belongs to the field of audio conversion, and discloses a method and device for realizing real-time conversion of LATM AAC audio streams. The method comprises: step 1. receiving and processing the audio data stream, and reading the audio frame data; step 2. judging whether the audio frame data header is in the LATM AAC data format, and if so, jumping to step 3. If not Then directly jump to step 5; step 3. analyze the audio frame data and obtain LATM AAC audio frame core parameters and audio load data; step 4. according to the obtained LATM AAC audio frame core parameters and audio load data, form ADTS AAC audio frame; Step 5. Output the audio frame. The invention effectively realizes the judgment of LATM AAC audio in the transmission code stream, container analysis and conversion to ADTS AAC, so that the audio decoding library can well support the LATM AAC audio stream, and the system integration cost is reduced.

Description

technical field [0001] The invention belongs to the field of audio conversion, and in particular relates to a method and device for realizing real-time conversion of LATM AAC audio streams. Background technique [0002] With the popularity of high-definition programs, HEVC and AAC (Advanced Audio Coding, Advanced Audio Coding) formats for audio and video content in MPEG2-TS (transport stream for audio, video, and data) real-time transport streams have become popular. AAC is an audio compression coding algorithm with a high compression ratio. The AAC audio compression coding standard is currently the most widely used low-bit-rate audio coding standard. The rate is lower, which effectively saves the transmission bandwidth. In the applications of mobile multimedia broadcasting, Internet streaming media, IPTV and other fields, the audio coding technology of AAC has been adopted more and more. [0003] The audio part uses AAC to obtain excellent sound quality and multi-channel ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10L19/16H04L29/06H04N21/439
CPCH04N21/4394H04N21/4398G10L19/167G10L19/173H04L65/75
Inventor 车明贤刘学文陈玉杰洪观洲
Owner SHENZHEN STATE MICRO TECH CO LTD
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