Digital VTR increasing recorded amount of high priority data

Details Digital VTR increasing recorded amount of high priority data Digital VTR increasing recorded amount of high priority data

1997-05-16

2000-01-04

Faber, Alan

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Data in specific format

386 68, 386 73, 386109, G11B 509

Patent

active

060116633

ABSTRACT:
The digital VTR includes an extractor, variable-length decoder, quantizer and variable-length encoder. The extractor receives digital data divided into blocks, and which is quantized and variable-length coded on a block-by-block basis. Portions of the digital data are encoded according to a first type of encodation, and other portions of the digital data are encoded according to a second type of encodation. The extractor identifies and extracts the digital data encoded according to the first type of encodation. The variable-length decoder variable-length decodes the extracted portions of the digital data, while the quantizer quantizes the decoded data output by the variable length decoder. The variable length encoder variable-length encodes the quantized decoded data to form special-playback data. Alternatively, a convertor converts the extracted portions of the digital data into variable-length coded data having different quantization steps to form the special-playback data.

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"A Recording Method of ATV data on a Consumer Digital VCR" International Workshop on HDTV '93, Oct. 26 to 28 in Ottawa, Canada.
John G. Proakis, Digital Communications; 2nd Edition, 1989, pp. 76-86, McGraw-Hill Book Company.

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