Patent
1993-06-16
1994-10-18
Knepper, David D.
395 214, 395 238, 395 239, G10L 302
Patent
active
053575946
ABSTRACT:
The invention relates to the design of analysis and synthesis windows for use in high-quality transform encoding and decoding of audio signals, especially encoding and decoding having a short signal-propagation delay. The design method derives a pair of analysis/synthesis windows from a known window function which satisfy various filter selectivity and window overlap-add constraints.
REFERENCES:
Hamming, Digital Filters, Chapters 5 & 9, 1973, Prentice-Hall, pp. 90-108 and 167-187.
Musmann, "The ISO Coding Standard," Globecom '90, IEEE Global Telecommunications Conference & Exhibition, San Diego, Calif., Dec. 2-5, 1990, pp. 511-517.
F. J. Harris, "On the Use of Windows for Harmonic Analysis with the Discrete Fourier Transform," Jan. 1978, pp. 51-83, Proc. of the IEEE vol. 66, No. 1.
K. M. M. Prabhu, et al., "Optimised Data Windows," Jan. 1980, pp. 38-40, Electronics Letters, vol. 16, No. 1.
B. Feiten, "Spectral Properties of Audio Signals and Masking with Aspect to Bit Data Reduction," Mar. 1989, pp. 1-18, 86th Convention, Hamburg, Germany, AES (Audio Engineering Society).
T. Lookabaugh, et al., "Application of the Princen-Bradley Filter Bank to Speech and Image Compression," Apr. 1989, NASA contracts NAGW-419 and NCC-2-307.
Dolby Laboratories Licensing Corporation
Gallagher Thomas A.
Knepper David D.
Lathrop David N.
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