Title:
SYSTEM TRANSMITTING OR STORING INPUT SIGNAL
Document Type and Number:
Japanese Patent JPS63133724
Kind Code:
A
Abstract:
In known differential encoder and decoder systems, a number of processing steps within a scanning clock must be performed in the differential pulse code modulator at one location in a time-critical loop, namely a summation, a multiplication with addition, a subtraction and a quantization. For the case, which practically always occurs, particularly in picture processing, where a number of signals not used for the prediction sample is located between the signals used for the prediction sample, a solution is provided in which only a translation and an addition are required within the time-critical loop. Such an arrangement corresponds to a special split-up of the equation for the prediction error signal in single terms. The solution provided can be modified in different manners so as to economize on elaborate components, and can also be used for adaptive modulators. The same measures can also be used in the demodulator.
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Inventors:
IENSU ROOZEBUROTSUKU
Application Number:
JP25705787A
Publication Date:
June 06, 1988
Filing Date:
October 12, 1987
Export Citation:
Assignee:
PHILIPS NV
International Classes:
H03M7/38; H03M3/04; H04B14/06; H04N11/04; (IPC1-7): H03M7/38; H04B14/06; H04N11/04
Attorney, Agent or Firm:
Akihide Sugimura (1 outside)