Patent
1995-05-04
1997-07-22
MacDonald, Allen R.
395 212, 395 238, G10L 302
Patent
active
056510900
ABSTRACT:
Power normalization parts calculate the average powers of input signals of a plurality of channels for each frame and divide the signals by the calculated average powers to generate normalized signals and, at the same time, generate weights corresponding to the normalization gains. The normalized signals of the plurality of channels are combined in a combining part into predetermined sequences and outputted therefrom as one or more interleaved signal vectors. The combining part combines the weights from the power normalization part into the same sequences of the normalized signal and outputs one or more interleaved weight vectors. In a vector quantization part the signal vectors are vector quantized by the interleaved weight vectors corresponding thereto, respectively, and quantization indexes and normalization indexes are outputted as results of coding.
REFERENCES:
patent: 4963030 (1990-10-01), Makur
patent: 5475789 (1995-12-01), Nishiguchi
Gersho, Allen, et al., "Fully Vector-Quantized Subband Coding with Adaptive Codebook Allocation," Institute of Electrical and Electronics Engineers, International Conference on Acoustics, Speech and Signal Processing (ICASSP), San Diego, Mar. 19-21, 1984, vol. 1, Conf. 1984, pp. 10.7.1-10.7.4.
Iwakami Naoki
Moriya Takehiro
MacDonald Allen R.
Mattson Robert C.
Nippon Telegraph and Telephone Corporation
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