| 摘要 |
The invention relates to a method for selectively scrambling a coded bit-stream, the method comprising a step of determining at least one modifiable part in the coded bit-stream, wherein the compliance, regarding a coding standard, of a modified coded bit-stream comprising an alternative modifiable part is not affected; a step of selecting at least one modifiable part, wherein the rendering of a compliant modified coded bit-stream comprising selected alternative modifiable part is perceptually affected compared to the rendering of the coded bit-stream; a step of substitution, for each of the at least one selected modifiable part, of original modifiable part in the coded bit-stream by alternative modifiable part resulting in a compliant selectively scrambled bit-stream. The invention also relates to associated method for descrambling. |
