Patent ID: 11863751
Assignee: ORANGE
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 19:
20. A non-transitory computer-readable medium comprising instructions stored thereon which when executed by a processor of a decoding device configure the decoding device to:
decode a coded data stream representative of at least one image performed by a decoding device, said image being split into blocks, the decoding comprising, for at least one block of the image, referred to as a current block:
decoding an item of information indicating a coding mode of the current block,
determining the coding mode of the current block from among at least a first and a second coding mode, the first coding mode corresponding to a type of coding mode using a transform of the prediction residue before quantizing the coefficients and the second coding mode corresponding to a type of coding mode using no transform of the prediction residue before quantizing the coefficients,
obtaining a quantization parameter,
when the coding mode of the current block corresponds to the first coding mode, decoding the current block comprising determining a first quantization step according to the quantization parameter to dequantize, in a transform domain, a prediction residue associated with the current block,
when the coding mode of the current block corresponds to the second coding mode, decoding the current block comprising determining a second quantization step according to the quantization parameter to dequantize, in a spatial domain, a prediction residue associated with the current block.