Luma and chroma encoding using a common predictor
There are provided video encoders, video decoders, and corresponding methods. A video encoder for encoding video signal data for an image block includes an encoder for encoding all color components of the video signal data using a common predictor. A video decoder for decoding video signal data for an image block includes a decoder for decoding all color components of the video signal data using a common predictor. Additionally, an apparatus and method for encoding and decoding signal data for an image block includes an encoder and decoder for encoding/decoding color components of the video signal data without applying a residual color transform thereto. Furthermore, a video encoder and decoder for encoding/decoding video signal data for an image block includes an encoder and decoder for encoding/decoding the video signal data using unique predictors for each of color components of the video signal data.
1. An apparatus for encoding video signal data for an image block, the apparatus comprising an encoder for encoding color components of the video signal data without applying a residual color transform thereto, said encoder encodes all of the color components of the video signal data using a common color component predictor wherein sampling of the video signal data corresponds to a 4:4:4 format.
2. The apparatus of claim 1 , further comprising a pre-encoder, color transform module, in signal communication with said encoder, for selectively performing a color transform on color components of the video signal data prior to encoding of the color components by said encoder.
3. The apparatus of claim 2 , wherein the color transform performed by said pre-encoder color transform module is a non-residual color transform.
4. The apparatus of claim 2 , wherein said pre-encoder color transform module performs the color transform on source images corresponding to the video signal data.
5. The apparatus of claim 2 , wherein said pre-encoder, color transform module provides transformed color components of the video signal data to said encoder in the RGB format or any non-RGB format.
6. The apparatus of claim 1 , wherein the common predictor is a luma predictor used for both luma and chroma components of the video signal data.
7. The apparatus of claim 1 , wherein said encoder uses a common spatial prediction mode for all of the color components of the video signal data.
8. The apparatus of claim 7 , wherein the common spatial prediction mode is set by prev_intra8×8_pred_mode_flag, rem_intra8×8_pred_mode, prev_intra4×4_pred_mode_flag, and rem_intra4×4_pred_mode parameters of the International Telecommunication Union, Telecommunication Sector H.264 standard.
9. The apparatus of claim 1 , wherein said encoder uses common interpolation filters for B and P frames for all of the color components of the video signal data.
10. A method for encoding video signal data for an image block, the method comprising encoding color components of the video signal data without applying a residual color transform, said encoding step encodes all of the color components of the video signal data using a common color component predictor, and wherein said video signal data sampling corresponds to a 4:4:4 format.
11. The method of claim 10 , further comprising a pre-encoding step for selectively performing a color transform on color components of the video signal data.
12. The method of claim 11 , wherein the color transform performed by said pre-encoding step is a non-residual color transform.
13. The method of claim 11 , wherein said pre-encoding step performs the color transform on source images corresponding to the video signal data.
14. The method of claim 11 , wherein said pre-encoding step provides transformed color components of the video signal data for said encoding step in the RGB format or any non-RGB format.
15. The method of claim 10 , wherein the common predictor is a luma predictor used for both luma and chroma components of the video signal data.
16. The method of claim 10 , wherein said encoding step uses a common spatial prediction mode for all of the color components of the video signal data.
17. The method of claim 10 , wherein the common spatial prediction mode is set by prev_intra8×8_pred_mode_flag, rem_intra8×8_pred_mode, prev_intra4×4_pred_mode_flag, and rem_intra4×4_pred_mode parameters of the International Telecommunication Union, Telecommunication Sector H.264 standard.
18. The method of claim 10 , wherein said encoding step uses common interpolation filters for B and P frames for all of the color components of the video signal data.