A non-transitory computer readable medium comprising computer instructions which, when executed by a processor, configure the processor to perform a method of encoding a video signal including a first signal and a second signal, the method comprising act of:
- interleaving the first signal and the second signal to form a combined signal;
- encoding by an encoder the combined signal to form an encoded combined signal, wherein the encoding act encodes the first signal in a self-contained manner without using information from the second signal and encodes the second signal using information from the first signal;
- splitting the encoded signal into separate primary bitstreams including a first bitstream including data for the first signal and a second bitstream including data for the second signal;
- and
- providing the first bitstream with a first code to form a first coded bitstream;
- and
- providing the second bitstream with a second code to form a second coded bitstream, wherein the second code is different from the first code.