Video compression and encoding method
Disclosed herein is a method for decoding a video signal having at least one frame with a plurality of blocks including a current block, including generating, for at least a selected pixel in the current block, a predicted value for at least one pixel located in a row i and a column j of the current block using a processor and according to the following equation: X ij =L i +A j −C; wherein X ij is the predicted value, L i is the value of a pixel to the left of the current block, A j is the value of a pixel in a row above the current block and C is the value of a pixel in the row above and the column to the left of the current block and decoding the current block using the predicted value.
1. A method for decoding a video signal having at least one frame with a plurality of blocks including a current block, comprising:
generating, for at least a selected pixel in the current block, a predicted value for at least one pixel located in a row i and a column j of the current block using a processor and according to the following equation:
X ij =L i +A j —C;
wherein X ij is the predicted value, L i is the value of a pixel to the left of the current block, A j is the value of a pixel in a row above the current block and C is the value of a pixel in the row above and the column to the left of the current block; and
decoding the current block using the predicted value.
2. The method of claim 1 , wherein L i is the value of the pixel in the row i in the column to the left of the current block.
3. The method of claim 1 , wherein A j is the value of the pixel in the column j in the row above the current block.
4. The method of claim 1 , wherein the column to the left of the current block is adjacent to the current block.
5. The method of claim 1 , wherein the row above the current block is adjacent to the current block.
6. The method of claim 1 , wherein the pixels corresponding to the values L i , A j , and C are previously decoded pixels.
7. The method of claim 1 , wherein the equation corresponds to a first coding mode in a set of coding modes and wherein each coding mode in the set is indicative of a different prediction mode for generating predicted values.
8. The method of claim 7 , wherein the set of coding modes includes at least a second coding mode and wherein the following equation corresponds to the second coding mode:
X ij =( L i−1 +2 L i +L i+1 +2)/4.
9. The method of claim 7 , wherein the set of coding modes includes at least a second coding mode and wherein the following equation corresponds to the second coding mode:
X ij =( A j−1 +2 A j +A j+1 +2)/4.
10. The method of claim 1 , wherein L i is the value of the pixel in the row i in the column to the left of the current block and wherein A j is the value of the pixel in the column j in the row above the current block.
11. An apparatus for decoding a video signal having at least one frame with a plurality of blocks including a current block, comprising:
a memory; and
a processor configured to execute instructions stored in the memory to:
generate, for at least a selected pixel in the current block, a predicted value for at least one pixel located in a row i and a column j of the current block using a processor and according to the following equation:
X ij =L i +A j −C;
wherein X ij is the predicted value, L i is the value of a pixel to the left of the current block, A j is the value of a pixel in a row above the current block and C is the value of a pixel in the row above and the column to the left of the current block; and
decode the current block using the predicted value.
12. The apparatus of claim 11 , wherein L i is the value of the pixel in the row i in the column to the left of the current block.
13. The apparatus of claim 11 , wherein A j is the value of the pixel in the column j in the row above the current block.
14. The apparatus of claim 11 , wherein the column to the left of the current block is adjacent to the current block.
15. The apparatus of claim 11 , wherein the row above the current block is adjacent to the current block.
16. The apparatus of claim 11 , wherein the pixels corresponding to the values L i , A j , and C are previously decoded pixels.
17. The apparatus of claim 11 , wherein the equation corresponds to a first coding mode in a set of coding modes and wherein each coding mode in the set is indicative of a different prediction mode for generating predicted values.
18. The apparatus of claim 17 , wherein the set of coding modes includes at least a second coding mode and wherein the following equation corresponds to the second coding mode:
X ij =( L i−1 +2 L i +L i+1 +2)/4.
19. The apparatus of claim 17 , wherein the set of coding modes includes at least a second coding mode and wherein the following equation corresponds to the second coding mode:
X ij =( A j−1 +2 A j +A j+1 +2)/4.
20. The apparatus of claim 11 , wherein L i is the value of the pixel in the row i in the column to the left of the current block and wherein A j is the value of the pixel in the column j in the row above the current block.