Coded data generation or conversion – Digital code to digital code converters
Reexamination Certificate
2008-05-13
2008-05-13
Jeanglaude, Jean B (Department: 2819)
Coded data generation or conversion
Digital code to digital code converters
C341S173000, C714S758000
Reexamination Certificate
active
07372375
ABSTRACT:
It is intended to remove a risk of illegal high quality restoration while enabling trial viewing of contents such as music, to make it possible to reproduce contents with high quality by acquiring a relatively small amount of data, and to make it possible to implement hardware at a lower cost. To generate trial listening data containing dummy data, a pseudo random number R is generated first. A remainder r of R divided by 128 is calculated. The remainder r is coded and incorporated into high sound quality restoration data. A bandwidth limitation region of trial listening data is replaced by dummy data starting from its rth bit. As a result, the head position of the dummy data in the trial listening data varies frame by frame, whereby the safety of the trial listening data can be increased.
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Akagiri Kenzo
Haneda Naoya
Tsutsui Kyoya
Depke Robert J.
Jeanglaude Jean B
Rockey, Depke & Lyons LLC.
Sony Corporation
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