Video signal encoder and video signal decoder
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Issued Date -
May 2, 2002
app pub date -
Jun 18, 2001
filing date -
Jun 19, 2000
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A video signal encoder 1 subjects an video signal 100 of high sampling rate to hierarchical encoding. An enhancement layer bitstream 105 is then recorded on a removable recording medium 51, while a base layer bitstream 102 in a storage 40. Prior to the base layer bitstream 102 being transmitted, the recording medium 51 is mounted to a video signal decoder 2 after billing management, for example. The video signal decoder 2 reproduces an enhancement layer bitstream 107 from the recording medium 51 in synchronization with the reception of the base layer bitstream 106. Then, the two bitstreams are subjected to hierarchical decoding, and the resulting decoded video signal 110 of high sampling rate is outputted. Without the recording medium 51 mounted, a decoded video signal 108 of low sampling rate is an only output. In this manner, the hierarchically-encoded video signal can be processed on a layer basis for billing and access management.
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