Method, device, computer program, and information storage means for encoding or decoding a scalable video sequence

A device for encoding or decoding a scalable video sequence made of at least one lower layer and one upper layer, the device comprising:

• an internal base decoder configured to decode a lower layer bitstream to obtain first sample adaptive offset, SAO, parameters defining a first SAO filtering applied to at least one lower layer frame area;
• and
• an internal enhancement decoder configured to decode an upper layer bitstream into at least one decoded upper layer frame area, using a second SAO filtering applied to at least one processed frame area of a processed frame based on respective second SAO parameters;
• wherein part or all of the second SAO parameters are inferred from the first SAO parameters.

A non-transitory computer-readable medium carrying a program which, when executed by a microprocessor or computer system in a device, causes the device to perform a method of encoding or decoding a scalable video sequence made of at least one lower layer and one upper layer, the method comprising:

• decoding a lower layer bitstream to obtain first sample adaptive offset, SAO, parameters defining a first SAO filtering applied to at least one lower layer frame area;
• and
• decoding an upper layer bitstream into at least one decoded upper layer frame area, using a second SAO filtering applied to at least one processed frame area of a processed frame based on respective second SAO parameters;
• wherein part or all of the second SAO parameters are inferred from the first SAO parameters.