PULSE ALLOCATING METHOD IN VOICE CODING
First Claim
1. A pulse apportionment method in a fixed codebook search in speech coding for a stereo signal, comprising determining the number of pulses apportioned to channels of the stereo signal according to characteristics of the channels and similarity between the channels.
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Abstract
A pulse allocating method capable of coding stereophonic voice signals efficiently. In the fixed code note retrievals (ST21 to ST25) of this pulse allocating method, for individual subframes, the stereophonic voice signals are compared (ST21) to judge similarity between channels, and are judged (ST22) on their characteristics. On the basis of the similarity between the channels and the characteristics of the stereophonic signals, the pulse numbers to be allocated to the individual channels are determined (ST23). Pulse retrievals are executed (ST24) to determine the pulse positions for the individual channels, so that the pulses determined at ST24 are coded (ST25).
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Citations
6 Claims
- 1. A pulse apportionment method in a fixed codebook search in speech coding for a stereo signal, comprising determining the number of pulses apportioned to channels of the stereo signal according to characteristics of the channels and similarity between the channels.
Specification