Implicit signaling of scalability dimension identifier information in a parameter set

An electronic device comprising:

• a decoder for decoding a coded video sequence, the decoder comprising one or more processing devices configured to:
• receive a video syntax set that includes information applicable to the coded video sequence,
• determine, based on a flag included in the video syntax, that a scalability dimension identifier for the coded video sequence is implicitly signaled, wherein the flag is indicative of either implicit or explicit signaling of the scalability dimension identifier,
• wherein the scalability dimension identifier specifies a scalability dimension of a particular layer of the coded video sequence, the scalability dimension being one of multiple types, including:
• a spatial type and a quality type,
• derive the scalability dimension identifier from a network abstraction layer (NAL) unit header in response to determining that the scalability dimension identifier is implicitly signaled,
• decode an enhancement layer based on the scalability dimension, and
• generate a decoded video sequence based on, in part, the enhancement layer.