Title :
Sum-difference stereo transform coding
Author :
Johnston, J.D. ; Ferreira, A.J.
Author_Institution :
AT&T Bell Labs., Murray Hill, NJ, USA
Abstract :
An audio filterbank coder using both monophonic and stereophonic redundancy and irrelevancy is described. This coder, with a transform filterbank, uses both signal-processing gains and perceptual gains to provide transparent or nearly transparent coding of CD and R-DAT audio signals at 192 kb/s/stereo pair, and high-quality coding at 128 kb/s/stereo pair. Methods of using the interchannel redundancies and psychoacoustic characteristics are described
Keywords :
audio signals; digital audio tape; encoding; filters; transforms; video and audio discs; CD audio signals; R-DAT audio signals; audio filterbank coder; high-quality coding; interchannel redundancies; irrelevancy; perceptual gains; psychoacoustic characteristics; signal-processing gains; stereophonic redundancy; sum-difference stereo transform coding; transparent coding; Bit rate; Entropy coding; Filter bank; Frequency; Loudspeakers; Low-frequency noise; Psychoacoustic models; Psychology; Testing; Transform coding;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1992. ICASSP-92., 1992 IEEE International Conference on
Conference_Location :
San Francisco, CA
Print_ISBN :
0-7803-0532-9
DOI :
10.1109/ICASSP.1992.225993
