Method and apparatus for encoding and decoding image
AssigneeSamsung Electronics Co., Ltd.
InventorsYoung Beom Jung, Nyeong Kyu Kwon, Yo Won Jeong
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Abstract
An image encoding apparatus based on a system on chip (SoC) which encodes a residual block of a current block including a first value calculator configured to calculate a first value for the residual block in a space domain, a comparator configured to decide whether to transform the residual block into a transform domain according to a size of the first value, and a transform unit configured to transform the residual block into the transform domain according to a decision on whether to transform.
Claims11
An image encoding method based on a system on chip (SoC) which encodes a residual block of a current block, the image encoding method comprising:
- generating a first value based on the residual block;
- comparing the first value with a second value and deciding whether to transform the residual block according to a comparison result;
- encoding the residual block according to the decision on whether to transform the residual block;
- and
- generating the second value based on the residual block,
- wherein the first value is obtained by performing a first operation on the residual block in a space domain and the second value is obtained by performing the first operation on the residual block in a transform domain.
An image encoding method based on a system on chip (SoC) which encodes a residual block of a current block, the image encoding method comprising:
- calculating a first value in a space domain for the residual block;
- comparing the first value with a predetermined threshold value and selecting one between the space domain and the transform domain according to a comparison result;
- and
- encoding the residual block in the selected domain.
An image encoding apparatus based on a system on chip (SoC) which encodes a residual block of a current block, the image encoding apparatus comprising:
- a space variance calculator configured to calculate a variance for the residual block in a space domain;
- a transform variance calculator configured to calculate a variance for the residual block in a transform domain;
- a comparator configured to compare the variance for the residual block in the space domain with the variance for the residual block in the transform domain and decide whether to transform the residual block according to a comparison result;
- a transform unit configured to transform the residual block into the transform domain according to the decision on whether to transform the residual block;
- a quantization unit configured to quantize the residual block that has been transformed;
- and
- an entropy coding unit configured to perform entropy coding on the residual block that has been quantized.
Dependencies are inferred from the claim text.