Dynamic bit allocation for three-dimensional subband video coding
First Claim
1. A method of coding an image signal sequence, the image signal sequence comprising a plurality of image signals, an image signal comprising a set of pixel signals, the method comprising the steps of:
- filtering the image signal sequence into a plurality of sets of sub-band pixel signals;
coding one or more pixel signals of a first set of sub-band pixel signals using one or more bits of a first quantity of bits, wherein each bit of the first quantity of bits is available for coding the first set of sub-band pixel signals;
providing a second quantity of bits for use in coding a second set of sub-band pixel signals, the second quantity of bits comprising one or more bits of the first quantity of bits not used in coding the first set of sub-band pixel signals; and
coding one or more pixel signals of the second set of sub-band pixel signals using one or more bits of the second quantity of bits.
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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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Citations
14 Claims
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1. A method of coding an image signal sequence, the image signal sequence comprising a plurality of image signals, an image signal comprising a set of pixel signals, the method comprising the steps of:
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filtering the image signal sequence into a plurality of sets of sub-band pixel signals; coding one or more pixel signals of a first set of sub-band pixel signals using one or more bits of a first quantity of bits, wherein each bit of the first quantity of bits is available for coding the first set of sub-band pixel signals; providing a second quantity of bits for use in coding a second set of sub-band pixel signals, the second quantity of bits comprising one or more bits of the first quantity of bits not used in coding the first set of sub-band pixel signals; and coding one or more pixel signals of the second set of sub-band pixel signals using one or more bits of the second quantity of bits. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An apparatus for coding an image signal sequence, the image signal sequence comprising a plurality of image signals, an image signal comprising a set of pixel signals, the apparatus comprising:
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means for filtering the image signal sequence into a plurality of sets of sub-band pixel signals; means for coding one or more pixel signals of a first set of sub-band pixel signals using one or more bits of a first quantity of bits, wherein each bit of the first quantity of bits is available for coding the first set of sub-band pixel signals; means for providing a second quantity of bits for use in coding a second set of sub-band pixel signals, the second quantity of bits comprising one or more bits of the first quantity of bits not used in coding the first set of sub-band pixel signals; and means for coding one or more pixel signals of the second set of sub-band pixel signals using one or more bits of the second quantity of bits. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification