An implementation method and device for grid vector quantification coding

A vector quantization and quantization coding technology, which is applied in the field of the realization scheme of lattice and right quantization coding and decoding, can solve the problems of increasing the number of quantization processing bits, the complexity of the coding and decoding quantization processing process, and the increase of the memory space requirements of the quantizer.

Active Publication Date: 2008-09-17
HUAWEI TECH CO LTD +1
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Problems solved by technology

[0043] In the AMR-WB+ audio coding process, in order to enable more input vectors to be quantized by the basic codebook, the number of feature codewords contained in the basic codebook is relatively large, which makes the complexity of the encoding and decoding quantization process and quantization incr...

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  • An implementation method and device for grid vector quantification coding
  • An implementation method and device for grid vector quantification coding
  • An implementation method and device for grid vector quantification coding

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Embodiment Construction

[0069] In the implementation scheme of lattice vector quantization encoding and decoding provided by the embodiment of the present invention, the basic codebook that needs to be applied is newly designed, and the capacity of the basic codebook is further expanded, so that in the prior art, it is necessary to use the extended codebook The data represented by this book can be directly expressed only by using the basic codebook in this embodiment; moreover, the characteristic codewords contained in the basic codebook selected in the embodiment of the present invention are more than those contained in the basic codebook in the prior art. The number of feature codewords is small, so that the memory space occupied by the quantizer can be reduced and the speed of searching the basic codebook can be accelerated, thereby improving the efficiency of lattice vector quantization encoding and decoding.

[0070] The basic codebook provided by the embodiment of the present invention and the c...

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Abstract

The invention relates to a method and a device of realizing lattice vector quantifies coding and decoding. Mainly in a method of the lattice vector quantifying coding and decoding, a new basic code book is selected out and directly or indirectly comprises all points whose value is less than or equal to 3 of any dimension in a RE<8> point set, and points on a fourth grade hypersphere in the basic code book are all odd points so that part of nearest adjoint point values can be comprised in the basic code book only via corresponding odd number processing. The capacity of the basic code book selected out in the invention embodiment is further enlarged, and at the same time, vector quantization Leader number in the selected basic code book is further reduced compared with an amount of code words of basic code book in existing technique, so that occupancy of memory space of a quanxtizer is reduced and a speed of searching for the basic code book is greatly improved.

Description

technical field [0001] The present invention relates to the technical field of encoding and decoding, in particular to an implementation scheme of encoding and decoding with appropriate lattice quantization. Background technique [0002] With the rapid development of multimedia services, it is not only necessary to improve the efficiency and real-time performance of encoding, but also to expand the encoding bandwidth for services such as audio. At present, the encoding methods used mainly include: HEAAC (High-Efficiency Advance Audio Coding, high-efficiency advanced audio coding), EAAC+ (Enhanced Advance Audio Coding plus, enhanced advanced audio coding) and AMR-WB+ (Adaptive MultiRate WideBand plus, adaptive Multi-rate wideband) coding, in which HEAAC and EAAC+ are extended from high-bit-rate audio encoders, and AMR-WB+ is a hybrid coding method formed by extending low-bit-rate speech coding. [0003] Usually, in the audio coding process, in order to better combine some ch...

Claims

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Application Information

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IPC IPC(8): G10L19/04H03M7/30
CPCH04N19/00963H04N19/94
Inventor 王薇邹耀韩毅刘佩林李伟张清许丽净许剑峰杜正中胡晨桑盛虎
Owner HUAWEI TECH CO LTD
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