Quantitative coding/decoding method and device

Abstract

The embodiment of the invention provides a quantitative coding / decoding method and device, relating to the field of communication. The method and the device can effectively avoid error transmission caused by frame loss at the same time of reasonably removing inter-frame correlation and increasing the quantization efficiency so as to improve the robustness of errors and achieve better packet loss resistance. The method provided by the embodiment of the invention comprises the following steps of: performing non-inter-frame prediction quantization on a current frame to obtain a non-inter-frame prediction quantization result of the current frame; coding non-inter-frame prediction quantization index values distributed in the non-inter-frame prediction quantization process, and outputting the coded non-inter-frame prediction quantization index values to a decoding end; obtaining a prediction coefficient according to the non-inter-frame prediction quantization result of the current frame and at least one past frame; and quantizing the prediction coefficient, coding the coefficient quantization index values distributed in the quantization process, and outputting the coded coefficient quantization index values to the decoding end.

Description

technical field [0001] The present invention relates to the communication field, in particular to a quantization codec method and device. Background technique [0002] Quantization coding technology is a very widely used technology in the field of speech / audio coding, whether it is an AMR (Adaptive Multi Rate, adaptive multi-rate) speech coder, a joint ultra-wideband coder, or the MPEG ( Moving Picture Experts Group) AAC (Advanced Audio Coding, Advanced Audio Coding) encoder and quantization coding technology are indispensable key technologies, and the quality of quantization coding technology will directly affect the performance of the entire encoder. [0003] There are many classification methods of quantization techniques, one of which is to divide quantization techniques into scalar quantization and vector quantization. Vector quantization has been further developed because it can eliminate intra-frame correlation and statistical redundancy. [0004] Coding rate, quant...

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Problems solved by technology

[0007] In the process of implementing the present invention, the inventor found that the above method does not consider the robustness of the encoding method to errors, which will cause error transmission and poor anti-packet loss characteristics

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