FRAME BUFFERING IN ADAPTIVE RESOLUTION MANAGEMENT

1 . A decoder, the decoder comprising circuitry configured to:

receive a bit stream;

decode a first frame using the bit stream;

determine a scaled first frame using the first frame and a scaling constant;

store the first frame in a first picture buffer at a first index location; and

store the scaled first frame in a second picture buffer at the first index location.

2 . The decoder of claim 1 , wherein the second picture buffer stores frames of greater resolution than the first picture buffer.

3 . The decoder of claim 1 , wherein the second picture buffer stores frames of lesser resolution than the first picture buffer.

4 . The decoder of claim 1 , wherein the decoder is further configured to display the scaled first frame.

5 . The decoder of claim 1 , wherein the decoder is configured to decode at least a portion of a second frame in an adaptive resolution management mode using the first scaled frame as a reference frame.

6 . The decoder of claim 1 , wherein the decoder is configured to decode at least a portion of the first frame or a portion according to an adaptive resolution management mode.

7 . The decoder of claim 6 , wherein the adaptive resolution management mode is signaled in a picture parameter set (PPS).

8 . The decoder of claim 6 , wherein the adaptive resolution management mode is signaled in a sequence parameter set (SPS).

9 . The decoder of claim 1 , wherein the scaling constant includes a vertical scaling component and a horizontal scaling component.

10 . The decoder of claim 1 , wherein the decoder comprises:

an entropy decoder processor configured to receive the bit stream and decode the bit stream into quantized coefficients;

an inverse quantization and inverse transformation processor configured to process the quantized coefficients including performing an inverse discrete cosine;

a deblocking filter;

a frame buffer; and

an intra prediction processor.

11 . A method comprising:

receiving a bit stream;

decoding a first frame using the bit stream;

determining a scaled first frame using the first frame and a scaling constant;

storing the first frame in a first picture buffer at a first index location; and

storing the scaled first frame in a second picture buffer at the first index location.

12 . The method of claim 11 , wherein the second picture buffer stores frames of greater resolution than the first picture buffer.

13 . The method of claim 11 , wherein the second picture buffer stores frames of lesser resolution than the first picture buffer.

14 . The method of claim 11 , further comprising displaying the scaled first frame.

15 . The method of claim 11 , further comprising decoding at least a portion of a second frame in an adaptive resolution management mode using the first scaled frame as a reference frame.

16 . The method of claim 11 further comprising decoding at least a portion of the first frame according to an adaptive resolution management mode.

17 . The method of claim 16 , wherein the adaptive resolution management mode is signaled in a picture parameter set (PPS).

18 . The method of claim 11 , wherein the adaptive resolution management mode is signaled in a sequence parameter set (SPS).

19 . The method of claim 11 , wherein the scaling constant includes a vertical scaling component and a horizontal scaling component.

20 . The method of claim 11 , wherein at least one of the receiving, the decoding, the determining, and the storing is performed by a decoder, the decoder comprising:

an entropy decoder processor configured to receive the bit stream and decode the bit stream into quantized coefficients;

an inverse quantization and inverse transformation processor configured to process the quantized coefficients including performing an inverse discrete cosine;

a deblocking filter;

a frame buffer; and

an intra prediction processor.