Super frame track parameter vector quantizing method

A technology of vector quantization and parameter vector, applied in the field of speech coding, which can solve problems such as low prediction efficiency and poor quantization effect of channel parameters
CN1614686AInactive Publication Date: 2005-05-11TSINGHUA UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
TSINGHUA UNIV
Publication Date
2005-05-11
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

A vector quantization method includes framing inputted voice signal sample point to form a super frame, picking up A sound channel parameter as well as voiceless and voiced consonant parameter for quantization, converting A sound channel parameter to be line spectrum pair parameter, deducting DC subcomponent, confirming line spectrum pair predictive value, using line spectrum pair parameter without DC to detuct the prodictive value for carrying out vector quantization.
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Description

technical field

[0001] The invention belongs to the technical field of speech coding, and in particular relates to the technology of multi-frame joint processing of speech coding with low code rate parameters. Background technique

[0002] Speech coding is widely used in communication systems, voice storage and playback systems, and consumer products with voice functions. In recent years, the International Telecommunication Union (ITU), some regional organizations and some countries have successively formulated a series of speech compression coding standards, and obtained satisfactory speech quality at the coding rate of 1.2kb / s to 16kb / s. At present, domestic and foreign research mainly focuses on high-quality voice compression coding at a rate below 1.2kb / s, which is mainly used for wireless communication, secure communication, and large-capacity voice storage and playback. Because the coding rate is too low, it is necessary to adopt the parametric speech coding technolog...

Claims

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