Adaptive video encoder for two-layer encoding of video signals o

Details Adaptive video encoder for two-layer encoding of video signals o Adaptive video encoder for two-layer encoding of video signals o

1993-09-02

1996-05-07

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 79, H04J 316

Patent

active

055153771

ABSTRACT:
The quality of video images received at the remote end of an ATM network capable of transmitting data at high and low priorities is greatly improved at high cell loss levels by employing a two-layered video encoding technique that adapts the method for encoding information transmitted in the low-priority bit-stream to the rate of cell loss on the network so that compression efficiency and image quality are high when the network load is low and resiliency to cell loss is high when the network load is high. The encoder adapts its encoding method in response to a cell loss information signal generated by the remote decoder by selecting the prediction mode used to encode the low-priority bit-stream, and by changing the frequency at which slice-start synchronization codes are placed within the low-priority bit-stream.

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Telecommunication Standardization Sector, Study Group 15, Experts Group for ATM Video Coding, Document AVC-491b, Version 2, Apr. 1993 ISO-IEC/JTCl/SC29/WG11, "Coded Representation of Picture and Audio Information", pp. 1-119.

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