Method for encoding and decoding at picture layer and slice layer, coder and decoder

摘要

Disclosed are methods for coding and decoding at picture layer and slice layer, and corresponding coder and decoder. The method comprises: coder selecting, according to network transmission state and video characteristic, different constrained loop filter (CLF) and/or constrained intra-prediction (CIP) control modes for one of the following three objects: 1: different video sequences; 2: pictures in different periods in the same video sequence; 3: different slices in the same picture; according to the selected CLF and/or CIP control mode, coding CLF and/or CIP control flag bits in picture layer parameter set and slice layer parameter set; and a decoder parsing slice layer bitstream containing header information, picture layer parameter set and/or slice layer parameter set, and according to the obtained CLF and/or CIP control flag bits, decoding picture and slice by using the corresponding CLF and/or CIP control mode. Through the present invention, a desirable tradeoff can be achieved between coding efficiency and error resilience performance.

主权项

1. A method for coding at picture layer and slice layer, comprising:
selecting, by a coder, Constrained Loop Filter (CLF) and/or Constrained Intra Prediction (CIP) control modes for one of the following three objects according to network transmission state and video content characteristic: different video sequences; pictures in different time periods in the same video sequence; different slices in the same picture; and coding, by the coder, CLF and/or CIP control flag bits in corresponding picture layer parameter set(s) and slice layer parameter set(s) according to the selected CLF and/or CIP control modes.