Method and apparatus for coding and decoding

A coding apparatus, comprising:

• an analyzing unit configured to obtain a value of a first sample, a value of a second sample, and a value of a third sample, wherein the first sample, the second sample, and the third sample are included in a data frame;
• a sample sorting unit configured to determine that the value of the third sample is different from the value of the first sample and the value of the second sample;
• a first coding unit configured to encode the third sample in the data frame in a first coding mode to obtain a first data stream;
• a second coding unit configured to encode the first sample and the second sample in the data frame in a second coding mode to obtain a second data stream;
• and
• a multiplexing unit configured to multiplex the first data stream and the second data stream to obtain an output coded data stream of the data frame.

A non-transitory computer-readable medium having computer usable instructions stored thereon for execution by a processor, wherein the instructions cause the processor to:

• obtain a data frame including a first sample, a second sample, and a third sample;
• obtain a value of the first sample, a value of the second sample, and a value of the third sample, wherein the value of the first sample is different from the value of the second sample;
• determine that the value of the third sample is different from the value of the first sample and the value of the second sample;
• encode the third sample in a first coding mode;
• encode the first sample and the second sample in a second coding mode that is different from the first coding mode;
• and
• multiplex the encoded first sample, the encoded second sample, and the encoded third sample to generate an output coded data stream of the data frame.