Method and apparatus for adjusting dynamic range and gain in an

Details Method and apparatus for adjusting dynamic range and gain in an Method and apparatus for adjusting dynamic range and gain in an

1995-06-07

1997-05-27

MacDonald, Allen R.

395214, 395 238, G10L 302, G10L 900

Patent

active

056339810

ABSTRACT:
An audio encoder/decoder system suitable for digital motion picture film soundtracks provides for adjusting playback signal gain and dynamic range by modifying the scale factors of scaled spectral information. In one embodiment of a transform coding system, transform coefficients are expressed in floating-point form and adjustments are made by modifying the exponents in the floating-point representation.

REFERENCES:
patent: Re29490 (1977-12-01), Shamma
patent: Re30278 (1980-05-01), Stumpf et al.
patent: 2361490 (1944-10-01), Mueller
patent: 2714633 (1955-08-01), Fine
patent: 3067287 (1962-12-01), Percival
patent: 3067292 (1962-12-01), Minter
patent: 3200207 (1965-08-01), Rainer et al.
patent: 3272906 (1966-09-01), De Vries et al.
patent: 3836715 (1974-09-01), Ito et al.
patent: 3845572 (1974-11-01), McCanney
patent: 3848092 (1974-11-01), Shamma
patent: 3907412 (1975-09-01), Schaller et al.
patent: 3934086 (1976-01-01), Takahashi
patent: 3952157 (1976-04-01), Takahashi et al.
patent: 3973839 (1976-08-01), Stumpf et al.
patent: 4236039 (1980-11-01), Cooper
patent: 4251688 (1981-02-01), Furner
patent: 4256389 (1981-03-01), Engebretson
patent: 4321675 (1982-03-01), Harris et al.
patent: 4455649 (1984-06-01), Esteban et al.
patent: 4713776 (1987-12-01), Araseki
patent: 5109417 (1992-04-01), Fielder et al.
patent: 5230038 (1993-07-01), Fielder et al.
patent: 5255210 (1993-10-01), Gardner et al.
patent: 5323396 (1994-06-01), Lokhoff
patent: 5327520 (1994-07-01), Chen
Sauvagerd, U "Bit-Rate Reduction for High Quality Audio Signals Using Floating-Point Wave Digital Filters", 1988 IEEE International Symposium on Circuits and Systems.
Van der Waal, et al., "Subband Coding of Stereophonic Digital Audio Signals," IEEE ICASSP, Toronto, May 1991, pp. 3601-3604.
"Coding of Moving Pictures and Associated Audio for Digital Storage Media At Up To About 1.5 Mbit/s," ISO, CD 11172-3, Annex 3-G, pp. G-1 to G-4.
S. P. Lipshitz, J. Vanderkooy, R. A. Wannamker, "Minimally Audible Noise Shaping," J. Audio Eng. Soc., vol. 39, Nov. 1991, pp. 836-852; and particularly pp. 836-838.
G. Theile, G. Stoll, A. Silzle, "MUSICAM-Surround: A Multi-Channel Stereo Coding Method," AES 92nd Convention Preprint 3337, Vienna, Mar. 1992.
"MUSICAM, Detailed description of sound coding algorithm," International Organization for Standardization, MPEG 89/206, Dec. 1989.
W. S. Percival, "A Compressed-Bandwidth Stereophonic System for Radio Transmission," Institute of Electrical Engineers (U.K.), Paper No. 3152E, Nov. 1959, pp. 234-238.
O. Kohsaka, et al., "Sound-Image Localization in Multichannel Matrix Reproduction," J. Audio Eng. Soc., Sep. 1972, vol. 20, No. 7, pp. 542-548.
Woodward, "Quadraphony--A Review," J. of Audio Eng. Soc., 1977,vol. 25, pp. 843-854.
Geluk, "Compatible Stereophonic Broadcasting Systems for Spatial Reproduction," J. of Audio Eng. Soc., 1980, vol. 28, pp. 136-139.
Press, et al., Numerical Recipes: The Art of Scientific Computing, New York, 1986, pp. 52-64.
ten Kate, et al., "Digital Audio Carrying Extra Information," IEEE ICASSP., Albuquerque, Apr. 1990, vol. 3, pp. 1097-1100.
Chiariglione, "Coding of Moving Pictures and Associated Audio," Berlin Meeting Documents, ISO, Dec. 1990, Appendix pp. 100-101 and two flow charts.
Mussmann, "The ISO Coding Standard," IEEE Global Telecommunications Conf. and Exhibition, San Diego, Dec. 1990, vol. 1, pp. 405.1.1-405.1.7.
Theile, "HDTV Sound Systems: How Many Channels?," AES 9th Int. Conf., Detroit, Feb. 1991, pp. 217-232.

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