Television – Bandwidth reduction system
Patent
1993-07-16
1994-05-03
Brier, Jeffery
Television
Bandwidth reduction system
H04N 713
Patent
active
053092325
ABSTRACT:
The present invention provides a method of coding a set of multi-level signals, such as video signals. The method comprises filtering the set of multi-level signals into one or more sets of multi-level sub-band signals; allocating a first quantity of bits for use in coding a first set of sub-band signals; coding the first set of multi-level sub-band signals using zero or more of the first quantity of allocated bits; allocating a second quantity of bits for use in coding a second set of sub-band signals, the second quantity of bits comprising zero or more of the first quantity of bits not used in coding the first set of multi-level sub-band signals; and coding the second set of multi-level sub-band signals using zero or more of the second quantity of allocated bits. Three examples of the method are provided. A hardware implementation involving the use of digital signal processors operating in parallel is also provided.
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Hartung John
Jacquin Arnaud E.
Michel Thomas A.
Podilchuk Christine I.
AT&T Bell Laboratories
Brier Jeffery
Brown Kenneth M.
Restaino Thomas A.
Tung Bryan S.
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