Expanding structure and corresponding expanding device of additional data for digital audio coding

Abstract

The invention relates to an expanding structure and a corresponding expanding device of additional data for a digital audio coding. The additional data is arranged at the frame tail of a corresponding audio frame and comprises an additional data total length byte for describing the total byte length of the additional data, and an additional data byte which comprises at least one additional data unit; the additional data unit comprises a data length byte for describing the byte length of the additional data unit, a data type byte for describing the data type of the additional data unit, and a data content byte for describing the additional data content of the additional data unit, wherein the additional data total length byte is arranged in front of the additional data byte. The invention also relates to the expanding device of the additional data for digital audio coding. The expanding structure and the corresponding expanding device of the additional data for digital audio coding can adapt to various types of additional data at the same time with high encoding efficiency.

Description

technical field [0001] The present invention relates to the field of digital audio coding and decoding, more specifically, relates to an extension structure of additional data of DRA digital audio coding and a corresponding extension device. Background technique [0002] The existing digital audio coding technology will add additional data to the audio frame, and use the additional data to process the digital audio coding effect, and at the same time make each audio frame have a fixed bit length, so as to facilitate the digital audio codec control. [0003] In the audio coding standard of the digital audio coding standard ISO / IEC MPEG-1, the additional data is generally set at the end of each audio frame, and the additional data can be filled by the user to maintain a fixed bit rate. The additional data here is not specifically defined and can be defined by the user. [0004] In the DAB (Digital Audio Broadcasting, digital signal broadcasting) audio coding standard, additi...

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Problems solved by technology

[0010] The technical problem to be solved by the present invention is that, aiming at the technical problem that the extension structure of the additional data of the digital audio coding in the prior art and the type of the additional data in the corresponding extension device are incompatible or make the efficiency of the data audio coding low, provide An extended structure of additional data of DRA digital audio coding that can simultaneously apply multiple types of additional data and has high coding efficiency, and a corresponding extension device

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