Hybrid video coding techniques

A method for encoding a base layer conforming to a second coding technology in a hybrid scalable bitstream, the hybrid scalable bitstream comprising the base layer conforming to the second coding technology and at least one enhancement layer conforming to a first coding technology, wherein the first and second coding technology are not the same, and wherein both first and second coding technologies use Network Abstraction Layer (NAL) units, the method comprising:

• encoding, in a base layer encoding device compliant with the second coding technology, the at least one second NAL unit, and
• encapsulating at least one second NAL unit conforming to the second coding technology into a first NAL unit of the hybrid bitstream identified by a pre-determined value of a nal_unit_type indicating the NAL unit is an encapsulation NAL unit,
• wherein the second coding technology is identified by a syntax element in a Video Parameter Set (VPS);
• and
• wherein both the first and second coding technology support temporal layers, and the VPS further includes information indicative of a derivation of the temporal layer associated with the second NAL unit from the temporal layer associated with the first NAL unit.

A system for decoding a base layer conforming to a second coding technology from a hybrid scalable bitstream, the hybrid scalable bitstream comprising the base layer conforming to the second coding technology and at least one enhancement layer conforming to a first coding technology, wherein the first and second coding technology are not the same, and wherein both first and second coding technologies use Network Abstraction Layer (NAL) units, the system comprising:

• a decoding device, the decoding device being compliant with the second coding technology and being configured to:
• extract at least one second NAL unit conforming to the second coding technology from a first NAL unit of the hybrid bitstream identified by a pre-determined value of a nal_unit_type indicating the NAL unit is an encapsulation NAL unit, and
• decode the at least one second NAL unit,
• wherein the second coding technology is identified by a syntax element in a Video Parameter Set (VPS);
• and
• wherein both the first and second coding technology support temporal layers, and the VPS further includes information indicative of a derivation of the temporal layer associated with the second NAL unit from the temporal layer associated with the first NAL unit.

A system for encoding a base layer conforming to a second coding technology in a hybrid scalable bitstream, the hybrid scalable bitstream comprising the base layer conforming to the second coding technology and at least one enhancement layer conforming to a first coding technology, wherein the first and second coding technology are not the same, and wherein both first and second coding technologies use Network Abstraction Layer (NAL) units, the system comprising:

• an encoding device, the encoding device being configured to:
• encode, in a base layer encoding device compliant with the second coding technology, the at least one second NAL unit, and
• encapsulate at least one second NAL unit conforming to the second coding technology into a first NAL unit of the hybrid bitstream identified by a pre-determined value of a nal_unit_type indicating the NAL unit is an encapsulation NAL unit,
• wherein the second coding technology is identified by a syntax element in a Video Parameter Set (VPS);
• and
• wherein both the first and second coding technology support temporal layers, and the VPS further includes information indicative of a derivation of the temporal layer associated with the second NAL unit from the temporal layer associated with the first NAL unit.