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Title
Verfahren zur Reduzierung von Daten bei der Uebertragung und/oder Speicherung digitaler Signale mehrerer abhaengiger Kanaele
Date Issued
1999
Author(s)
Herre, J.
Seitzer, D.
Eberlein, E.
Brandenburg, K.
Patent No
1992-4217276
Abstract
The description relates to a process for the reduction of data during the transmission and/or storage of digital stereo signals. Since the signals are independent and originate from two stereo channels, an additional reduction of the data volume is possible during transmission. In known processes for encoding stereo signals, interference can be caused by the encoding process in the event of an unfavourable signal composition. This interference can in fact mask the signal present in the channel and impair listening pleasure. In the process according to the invention, the necessary data rate for a separate coding of two channels and for a common coding are balanced using the spectral values of corresponding blocks of the two channels. Common coding of the two channels takes place as long as the data rate for the common coding does not exceed the data rate for separate coding of the two channels by a preset value. If this occurs, the spectral values of the corresponding blocks are similar so that common coding is preferred. In the event of highly disparate signals, balancing leads to the separate transmission of the signals. In order to reliably prevent interference, the use of stereo coding is dispensed with provisionally.
Language
de
Institute
Patenprio
DE 1992-4217276 A: 19920525