Video encoding device, video decoding device, video encoding method, video decoding method, and program
A video encoding device includes: pixel bit length increasing means for increasing a pixel bit length of an input image based on pixel bit length increase information; transform means for transforming output data of the pixel bit length increasing means; entropy encoding means for entropy-encoding output data of the transform means; non-compression encoding means for non-compression-encoding input data; multiplexed data selection means for selecting output data of the entropy encoding means or output data of the non-compression encoding means; and multiplexing means for multiplexing the pixel bit length increase information in a bitstream, wherein a pixel bit length of an image corresponding to the output data of the entropy encoding means and a pixel bit length of an image corresponding to the output data of the non-compression encoding means are different from each other.
1. A video encoding device comprising:
a pixel bit length increasing unit which increases a pixel bit length of an input image based on pixel bit length increase information;
a transform unit which transforms output data of the pixel bit length increasing unit;
an entropy encoding unit which entropy-encodes output data of the transform unit;
a non-compression encoding unit which non-compression-encodes input data;
a multiplexed data selection unit which selects output data of the entropy encoding unit or output data of the non-compression encoding unit; and
a multiplexing unit which multiplexes the pixel bit length increase information in a bitstream,
wherein a pixel bit length of an image corresponding to the output data of the entropy encoding unit and a pixel bit length of an image corresponding to the output data of the non-compression encoding unit are different from each other.
2. The video encoding device according to claim 1 , wherein the input data of the non-compression encoding unit is the input image before the increase of the pixel bit length.
3. The video encoding device according to claim 1 , comprising
a pixel bit length decreasing unit which decreases a pixel bit length based on the pixel bit length increase information,
wherein the input data of the non-compression encoding unit is output data of the pixel bit length decreasing unit.
4. The video encoding device according to claim 1 , comprising:
a prediction unit which predicts an image;
an inverse transform unit which inverse-transforms the output data of the transform unit; and
a non-compression decoding unit which decodes the output data of the non-compression encoding unit,
wherein the non-compression decoding unit increases a pixel bit length of a decoded image obtained by non-compression decoding, based on at least the pixel bit length increase information.
5. The video encoding device according to claim 1 , wherein the non-compression-encoding of the input data performed by the non-compression encoding unit is PCM encoding.
6. A video decoding device comprising:
a de-multiplexing unit which de-multiplexes a bitstream including at least pixel bit length increase information;
an entropy decoding unit which entropy-decodes transformed data of an image included in the bitstream;
an inverse transform unit which inverse-transforms the entropy-decoded transformed data of the image;
a non-compression decoding unit which non-compression-decodes non-compression-encoded data of an image included in the bitstream; and
a decoding control unit which controls the entropy decoding unit and the non-compression decoding unit,
wherein a pixel bit length of an image corresponding to input data of the entropy decoding unit and a pixel bit length of an image corresponding to input data of the non-compression decoding unit are different from each other.
7. The video decoding device according to claim 6 , wherein the non-compression decoding unit increases a pixel bit length of a decoded image obtained by the non-compression decoding, based on at least the pixel bit length increase information.
8. The video decoding device according to claim 7 , comprising
a prediction unit which predicts an image.
9. The video decoding device according to claim 6 , wherein the non-compression-decoding of the non-compression-encoded-data performed by the non-compression decoding unit is PCM decoding.
10. A video encoding method comprising:
transforming data obtained by increasing a pixel bit length of an input image based on pixel bit length increase information;
entropy-encoding the transformed data;
non-compression-encoding input data;
selecting the entropy-encoded data or the non-compression-encoded data; and
multiplexing the pixel bit length increase information in a bitstream,
wherein a pixel bit length of an image corresponding to the entropy-encoded data and a pixel bit length of an image corresponding to the non-compression-encoded data are different from each other.
11. The video encoding method according to claim 10 , wherein the non-compression-encoding input data comprises PCM encoding.
12. A video decoding method comprising:
de-multiplexing a bitstream including at least pixel bit length increase information;
entropy-decoding transformed data of an image included in the bitstream;
inverse-transforming the entropy-decoded transformed data of the image; and
non-compression-decoding non-compression-encoded data of an image included in the bitstream,
wherein a pixel bit length of an image corresponding to the transformed data of the image included in the bitstream and a pixel bit length of an image corresponding to the non-compression-encoded data of the image included in the bitstream are different from each other.
13. The video decoding method according to claim 12 , wherein the non-compression-decoding non-compression-encoded data of the image included in the bitstream comprises PCM decoding.
14. A non-transitory computer readable information recording medium storing a video encoding program, which, when executed by a processor, performs:
transforming data obtained by increasing a pixel bit length of an input image based on pixel bit length increase information;
entropy-encoding the transformed data;
non-compression-encoding input data;
selecting the entropy-encoded data or the non-compression-encoded data; and
multiplexing the pixel bit length increase information in a bitstream,
wherein a pixel bit length of an image corresponding to the entropy-encoded data and a pixel bit length of an image corresponding to the non-compression-encoded data are different from each other.
15. The non-transitory computer readable information recording medium according to claim 14 , wherein the non-compression-encoding input data comprises PCM encoding.
16. A non-transitory computer readable information recording medium storing a video decoding program, which, when executed by a processor, performs:
de-multiplexing a bitstream including at least pixel bit length increase information;
entropy-decoding transformed data of an image included in the bitstream;
inverse-transforming the entropy-decoded transformed data of the image; and
non-compression-decoding non-compression-encoded data of an image included in the bitstream,
wherein a pixel bit length of an image corresponding to the transformed data of the image included in the bitstream and a pixel bit length of an image corresponding to the non-compression-encoded data of the image included in the bitstream are different from each other.
17. The non-transitory computer readable information recording medium according to claim 16 , wherein the non-compression-decoding non-compression-encoded data of the image included in the bitstream comprises PCM decoding.