Gain Control for Multiple Description Coding

A method for decoding multiple descriptions for a media stream, comprising:

• determining, for a current block of the media stream, a first number of descriptions from the media stream, wherein each description comprises a scaled block corresponding to the current block;
• determining backward gain factors for the first number of scaled blocks;
• and
• determining the current block by applying the backward gain factors to the first number of scaled blocks.

A non-transitory computer-readable medium storing instructions which when executed by a computer system using a processor become operational with the processor for decoding multiple descriptions for a media stream, the non-transitory computer-readable medium comprising instructions to:

• determine, for a current block of the media stream, a first number of descriptions from the media stream by dequantizing quantization data decoded from the media stream, wherein each description comprises a scaled block corresponding to the current block;
• determine backward gain factors for the first number of scaled blocks;
• and
• determine the current block by applying the backward gain factors to the first number of scaled blocks.