Method of storing or decoding a stream of bits
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United States of America Patent
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Feb 6, 2007
Grant Date -
Jul 18, 2002
app pub date -
Aug 21, 2001
filing date -
Aug 22, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention relates to a method of storing a number of data bits of a secondary channel (30) in the frame of a main channel (20) and to a method of decoding a stream of bits relating to a secondary channel (30) embedded in the frames of a main channel (20) into a stream of data bits (62). In order to enable a certain synchronization and to guarantee a fixed amount of storage capacity in the secondary channel as well as to be able to correct deletions or insertions of bits in the secondary channel it is proposed according to the invention to form a secondary frame (11) having a fixed number of frame bits, to fill a fixed part of the secondary frame (11) with data bits (113), an end-bit (114) set to a first bit-value and, if necessary, with filling bits (115) set to a second bit-value, to encode the secondary frame (11) producing encoded data bits (113) and parity bits (112), which are finally embedded in the frame of the main channel (20). The invention relates also to a device for storing a number of data bits of the secondary channel (30) in the frame of a main channel (20) and to a device for decoding a stream of bits of relating to a secondary channel (30) embedded in the frames of a main channel (20).
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