Method for encoding and transmitting voice signals
First Claim
1. Method for encoding voice signals, wherein the voice signal is divided up into voice signal sections, wherein the excitation signal for the synthesis filter can be put together at least by means of a fixed codebook and an assigned second amplification factor, and optionally by means of an adaptive codebook with an associated first amplification factor, wherein the voice signal section is classified in terms of specific speech characteristics by means of a signal classifier, and wherein the value of the first amplification factor is specified as a function of the signal classifier, as a result of which the amount of data required to represent the adaptive codebook entry and first amplification factor in their entirety is reduced.
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Abstract
The invention relates to a method for encoding voice signals, especially so-called voice onset sections. By establishing the first amplification factor, the data quantity for representing the whole of the first or adaptive amplification factor and adaptive code book entry is reduced, whereby other parameters which occur during the voice encoding can be represented in a more precise manner. The invention also relates to a method for transmitting voice signals which are encoded in such a way.
26 Citations
7 Claims
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1. Method for encoding voice signals,
wherein the voice signal is divided up into voice signal sections, wherein the excitation signal for the synthesis filter can be put together at least by means of a fixed codebook and an assigned second amplification factor, and optionally by means of an adaptive codebook with an associated first amplification factor, wherein the voice signal section is classified in terms of specific speech characteristics by means of a signal classifier, and wherein the value of the first amplification factor is specified as a function of the signal classifier, as a result of which the amount of data required to represent the adaptive codebook entry and first amplification factor in their entirety is reduced.
Specification