Pulse or digital communications – Bandwidth reduction or expansion – Television or motion video signal
Patent
1995-06-05
1998-05-12
Chin, Stephen
Pulse or digital communications
Bandwidth reduction or expansion
Television or motion video signal
H04B 166
Patent
active
057517711
ABSTRACT:
The present invention provides a waveform data compression apparatus which can express waveform data by a small amount of compression data obtained by compressing the aforesaid waveform data, and a waveform data expansion apparatus which can reproduce the compression data produced by the aforesaid waveform data compression apparatus to obtain the original waveform data. The. waveform data compression apparatus interpolates waveform data of addresses before and behind the waveform data of an objective address in a block to be processed to acquire interpolated data of the objective address to be processed, and uses difference data between the interpolated data and the waveform data of the objective address to be processed, thereby compressing the waveform data. The waveform data expansion apparatus operates to perform reverse process to that performed by the waveform data compression apparatus.
REFERENCES:
patent: 4396906 (1983-08-01), Weaver
patent: 4715257 (1987-12-01), Hoshiai et al.
patent: 4781096 (1988-11-01), Suzuki et al.
patent: 5379241 (1995-01-01), Gregpain
Katsumata Masaaki
Kusakabe Satoshi
Chin Stephen
Kim Kevin
Roland Kabushiki Kaisha
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