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Vector quantization method and vector quantizer

A vector quantizer and vector quantization technology, applied in the field of vector quantization methods and vector quantizers, can solve the problems of high computational complexity, large codebook storage, large computational load, etc., and achieve the goal of reducing coding space and improving quantization quality. Effect

Active Publication Date: 2012-04-25
HUAWEI TECH CO LTD
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Problems solved by technology

[0013] Using the above quantization method to quantize the 16-dimensional ISF vector of the speech signal can obtain higher coding quality, but the corresponding codebook storage capacity is relatively large, and the computational complexity of quantization is relatively high because all codebooks need to be traversed during calculation. High, the amount of calculation is relatively large

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  • Vector quantization method and vector quantizer
  • Vector quantization method and vector quantizer

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Embodiment Construction

[0032] In order to make the object, technical solution, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples.

[0033] The embodiment of the vector quantization method provided by the embodiment of the present invention is as follows figure 1 shown, including:

[0034] Step 101, obtaining the vector to be quantized, performing N-level quantization on the to-be-quantized vector, and obtaining a residual vector after N-level quantization, wherein N is a positive integer;

[0035] Assuming two-level quantization, the input signal is [v 1 , v 2 ,...,v N ], the specific process of N-level quantization in the embodiment of the present invention can be as follows:

[0036] 1) Perform level-1 vector quantization on the m-dimensional input signal, assuming a level-1 codebook is:

[0037]

[0038] Using the preset judgment criteria, such as the minimum weighted me...

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Abstract

The invention relates to coding technology and discloses a method for quantizing a vector, and a vector quantizer, wherein the method for quantizing the vector comprises: obtaining a vector to be quantized, performing an N-grade quantization on the vector to be quantized so as to obtain a residual error vector after the N-grade quantization, wherein the N is a positive integer; selecting an adjusted quantity combination from at least two preset adjusted quantity combinations according to part or whole of index numbers of code books of each grade obtained when performing the N-grade quantization on the vector to be quantized; and obtaining an index number corresponding to the vector to be quantized according to the selected adjusted quantity combination. With the technical proposal provided by the embodiment of the invention, the coding space required by coding can be reduced.

Description

technical field [0001] The invention relates to coding technology, in particular to a vector quantization method and a vector quantizer. Background technique [0002] With the continuous development of computer technology in recent years, various multimedia applications are becoming more and more popular. As an indispensable speech coding technology for multimedia applications, great progress has been made in the last ten years. Currently commonly used encoding methods include run-length encoding, vector quantization (VQ: Vector Quantization) encoding, and the like. [0003] The core process of vector quantization coding is the process of quantizing the input vector. The following is an example of a method for vector quantization of Immittance Spectral Frequency (ISF: Immittance Spectral Frequency) in speech coding—the Wideband Adaptive Speech Codec (AMR-WB+) method as an example to illustrate the specific processing process of the existing vector quantization . [0004]...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10L19/12G10L19/14G10L19/038
Inventor 李立雄张德军张亮郎玥吴文海王庭红
Owner HUAWEI TECH CO LTD
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