Method for encoding signals, related systems and program product therefor
First Claim
1. A method for encoding video signals comprising the step of:
- subjecting video signals to unbalanced multiple description coding, said unbalanced multiple description coding comprising;
coding a video signal in a first high resolution packet and a second low resolution packet, said first high resolution packet representing a first high resolution description and said second low resolution packet representing a second low resolution description; and
using a first intra refresh period for said first high resolution description and a second intra refresh period for said second low resolution description, wherein the said second intra refresh period for said second low resolution description being shorter than said first intra refresh period for said first high resolution description.
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Abstract
A method for encoding video signals subjects the signals to unbalanced multiple description coding. The unbalanced multiple description coding codes a video signal in a first high resolution packet and a second low resolution packet and represents, respectively a first high resolution description and a second low resolution description. The unbalanced multiple description coding step includes using different intra refresh periods for the first and second high resolution descriptions, with an intra refresh period for the second low resolution description shorter than the intra refresh period of the first high resolution description.
41 Citations
29 Claims
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1. A method for encoding video signals comprising the step of:
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subjecting video signals to unbalanced multiple description coding, said unbalanced multiple description coding comprising;
coding a video signal in a first high resolution packet and a second low resolution packet, said first high resolution packet representing a first high resolution description and said second low resolution packet representing a second low resolution description; and
using a first intra refresh period for said first high resolution description and a second intra refresh period for said second low resolution description, wherein the said second intra refresh period for said second low resolution description being shorter than said first intra refresh period for said first high resolution description. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system for encoding video signals, said system comprising:
one or more encoders configured for unbalanced multiple description coding of video signals, wherein a first encoder is configured for coding an input signal in a first high resolution packet representing a first high resolution description and a second encoder is configured for coding said input signal in a second low resolution packet representing a second low resolution description, wherein said first encoder is further configured for applying a first intra refresh period for said first high resolution description and said second encoder is further configured for applying a second intra refresh period for said second low resolution description, the intra refresh period for said second low resolution description being shorter than the intra refresh period for the first high resolution description. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A system for receiving and decoding, to macroblocks of frames, a signal comprising a single packet aggregate of a high resolution packet and a low resolution packet, said signal produced by unbalanced multiple description coding of video signals using different intra refresh periods, an intra refresh period for said low resolution packet being shorter than the intra refresh period for said high resolution packet, said system comprising:
a de-packetizer module configured for extracting said high resolution packet and said low resolution packet from said single packet, said de-packetizer module sending said extracted high resolution packet and said low resolution packet to a respective first decoder and a second decoder, said first decoder and said second decoder supplying respectively a high resolution and a low resolution frame to a postprocessor, said postprocessor configured for performing an error concealment operation. - View Dependent Claims (22, 23, 24)
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25. A computer-readable medium containing a computer programming product for causing a computing device to encode video signals for transmission, the computer programming product comprising:
program code for subjecting video signals to unbalanced multiple description coding, said unbalanced multiple description coding comprising coding a video signal in a first high resolution packet and coding said video signal in a second low resolution packet, representing respectively a first high resolution description and a second low resolution description, said unbalanced multiple description coding further comprising using a first intra refresh period for said first high resolution description and a second intra refresh period for said second low resolution description, the second intra refresh period for said second low resolution description being shorter than the first intra refresh period of the first high resolution description. - View Dependent Claims (26, 27, 28, 29)
Specification