System for realization of complexity scalability in a layered video coding framework

A method of encoding a video signal in a layered manner, comprising:

• receiving the video signal in a base layer encoding system;
• outputting an encoded base layer stream;
• receiving data from the base layer encoding system into an enhancement layer encoding system;
• providing a plurality discrete cosine transform (DCT) modules in the enhancement layer encoding system;
• selecting one of the plurality of DCT modules;
• and
• generating an encoded enhancement layer stream using the selected DCT module.

A layered video decoding system, comprising:

• a base layer decoder for receiving and decoding a base layer video stream;
• and
• an enhancement layer decoder for receiving an enhancement layer video stream and generating a decoded enhanced video output, wherein the enhancement layer decoder includes:
• a plurality of inverse discrete cosine transform (IDCT) modules;
• and
• a selection system for selecting one of the IDCT modules.

A program product stored on a recordable medium for decoding a layered video stream, comprising:

• means for receiving and decoding a base layer video stream;
• and
• means for receiving an enhancement layer video stream and generating a decoded enhanced video output, including:
• a plurality of inverse discrete cosine transform (IDCT) modules;
• and
• means for selecting one of the IDCT modules.

A method of decoding a layered video stream, comprising:

• receiving an encoded base layer stream into a base layer decoder;
• decoding the encoded base layer stream and generating a decoded base layer stream;
• providing an enhancement layer decoder having a plurality of inverse discrete cosine transform (IDCT) modules;
• receiving an encoded enhancement layer stream into the enhancement layer decoder;
• selecting one of the plurality of IDCT modules;
• and
• decoding the encoded enhancement layer using the selected IDCT module.