Implicit signaling of scalability dimension identifier information in a parameter set

1. A method for decoding a coded video sequence comprising:

receiving a bitstream corresponding to coded pictures of said coded video sequence;

receiving a video syntax set that includes information applicable to said coded video sequence;

determining, based on a flag included in said video syntax set, whether a scalability dimension identifier is implicitly signaled;

wherein said scalability dimension identifier specifies a scalability dimension of a layer of said coded video sequence, the scalability dimension being one of multiple types, including a spatial type and a quality type;

in response to determining that the scalability dimension identifier is implicitly signaled, deriving the scalability dimension identifier from a network abstraction layer (NAL) unit header;

decoding a base layer of a picture in the video sequence; and

decoding an enhancement layer based on the scalability dimension,

wherein decoding the base layer comprises motion compensation.

2. The method of claim 1 wherein said multiple types comprising a multiview type.

3. The method of claim 1 wherein said scalability dimension identifier identifies said one of multiple types.

4. The method of claim 1 wherein said flag with a value of 1 specifies that the scalability dimension identifier is implicitly signaled.

5. The method of claim 1 wherein values of scalability dimension identifier are derived based on other information signaled in a video syntax set.

6. The method of claim 5 wherein the other information signaled in the video syntax set includes information about length in bits of the scalability dimension identifier.

7. The method of claim 6 wherein the length in bits of the scalability dimension identifier is specified using dimension_id_len_minus1[i].