Method for encoding signals, related systems and program product therefor
First Claim
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1. A method for encoding video signals comprising the steps 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 being shorter than said first intra refresh period for said first high resolution description,wherein said unbalanced multiple description coding further comprises a packetizer having a single output for aggregating said first high resolution packet and said second low resolution packet into a single packet for transmission;
wherein said second low resolution packet is smaller than said first high resolution packet,wherein aggregating comprises aggregating a low resolution packet belonging to a first frame with index n and a high resolution packet belonging to a second frame with index k, said index k being equal to index n minus an offset value, andwherein the offset value is larger than one in order to de-correlate the loss of the said high resolution packet and said low resolution packet.
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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.
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Citations
21 Claims
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1. A method for encoding video signals comprising the steps 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 being shorter than said first intra refresh period for said first high resolution description, wherein said unbalanced multiple description coding further comprises a packetizer having a single output for aggregating said first high resolution packet and said second low resolution packet into a single packet for transmission; wherein said second low resolution packet is smaller than said first high resolution packet, wherein aggregating comprises aggregating a low resolution packet belonging to a first frame with index n and a high resolution packet belonging to a second frame with index k, said index k being equal to index n minus an offset value, and wherein the offset value is larger than one in order to de-correlate the loss of the said high resolution packet and said low resolution packet. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A system for encoding video signals said system comprising:
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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 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 being shorter than the intra refresh period for the first high 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; and a packetizer module having a single output for aggregating said first high resolution packet and said second low resolution packet into a single packet for transmission, wherein said second low resolution packet is smaller than said first high resolution packet, wherein aggregating comprises aggregating a low resolution packet belonging to a first frame with an index n and a high resolution packet belonging to a second frame with index k, said index k being equal to index n minus an offset value, and wherein the offset value is larger than one in order to de-correlate the loss of the said high resolution packet and said low resolution packet. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A non-transitory computer-readable medium containing a computer programming product for causing a computing device to encode video signals for transmission, the computer programming product comprising:
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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 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 high resolution description, wherein the program code for subjecting video signals to unbalanced multiple description coding further comprises program code for aggregating said first high resolution description and said second low resolution description into a single packet stream for transmission; wherein the second low resolution packet is smaller than the first high resolution packet, wherein aggregating comprises aggregating a low resolution packet belonging to a first frame with index n and a high resolution packet belonging to a second frame with index k, said index k being equal to index n minus an offset value, and wherein the offset value is larger than one in order to de-correlate the loss of the said high resolution packet and said low resolution packet. - View Dependent Claims (19, 20, 21)
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Specification