Video encoding device, video decoding device, video encoding method, video decoding method, and program
AssigneeNEC Corporation
InventorKeiichi Chono
Life of this patent
Estimating the term…
Abstract
A video encoding device includes an intra prediction unit for performing intra prediction on an image, a frequency transform/quantization unit for frequency transform and quantizing a prediction error based on the intra prediction performed by the intra prediction unit, an entropy encoding unit for entropy-encoding a transform quantization value generated by the frequency transform/quantization unit, an edge detection unit for detecting edge information on an image block of the minimum frequency-transform block size of the image, and edge information storage unit for storing the edge information detected by the edge detection unit.
Claims10
A video encoding device comprising:
- an intra prediction unit which performs intra prediction on an image;
- a frequency transform/quantization unit which frequency-transforms and quantizes a prediction error based on the intra prediction performed by the intra prediction means unit;
- an entropy encoding unit which entropy-encodes a transform quantization value generated by the frequency transform/quantization unit;
- an edge detection unit which detects edge information on an image block of a minimum frequency-transform block size of the image;
- and
- an edge information storage unit which stores the edge information detected by the edge detection unit.
A video decoding device comprising:
- an entropy decoding unit which entropy-decodes a transform quantization value;
- an inverse quantization/inverse frequency transform unit which inverse-quantizes the transform quantization value and performs inverse frequency transform thereof;
- an intra prediction unit which performs intra prediction on an image;
- an edge detection unit which detects edge information on an image block of a minimum frequency-transform block size of the image;
- and
- an intra prediction direction selecting unit which selects an intra prediction direction used to decode a block to be decoded, based on the edge information detected by the edge detection unit.
A video encoding method comprising:
- performing intra prediction on an image;
- frequency-transforming and quantizing a prediction error based on the intra prediction to generate a transform quantization value;
- entropy-encoding the transform quantization value;
- detecting edge information on an image block of a minimum frequency-transform block size of the image;
- and
- storing the detected edge information in edge information storage means.
A video decoding method comprising:
- entropy-decoding a transform quantization value;
- inverse-quantizing the transform quantization value and performing inverse frequency transform thereof;
- performing intra prediction on an image;
- detecting edge information on an image block of a minimum frequency-transform block size of the image;
- and
- selecting an intra prediction direction used to decode a block to be decoded, based on the detected edge information.
A non-transitory computer readable information recording medium storing a video encoding program, when executed by a processor, performs a method for:
- performing intra prediction on an image;
- frequency-transforming and quantizing a prediction error based on the intra prediction to generate a transform quantization value;
- entropy-encoding the transform quantization value;
- detecting edge information on an image block of a minimum frequency-transform block size of the image;
- and
- storing the detected edge information in edge information storage means.
A non-transitory computer readable information recording medium storing a video decoding program, when executed by a processor, performs a method for:
- entropy-decoding a transform quantization value;
- inverse-quantizing the transform quantization value and performing inverse frequency transform thereof;
- performing intra prediction on an image;
- detecting edge information on an image block of a minimum frequency-transform block size of the image;
- and
- selecting an intra prediction direction used to decode a block to be decoded, based on the detected edge information.
Dependencies are inferred from the claim text.