Method for re-encoding image and apparatus therefor
AssigneeSamsung Electronics Co., Ltd.
InventorsDai-woong CHOI, Woong-il CHOI, Dae-sung CHO
Life of this patent
Estimating the term…
Abstract
Provided is a re-encoding method including obtaining a first quantization table from a bitstream including an image encoded using the first quantization table; obtaining a second quantization table based on a pattern representing a size distribution of values of elements of the first quantization table, the second quantization table including elements respectively corresponding to the elements of the first quantization table; and re-encoding a reconstructed image by using the second quantization table, the reconstructed image being obtained by decoding the encoded image by using the first quantization table.
Claims15
A re-encoding method comprising:
- obtaining a first quantization table from a bitstream including an image encoded using the first quantization table;
- obtaining a second quantization table based on a pattern representing a size distribution of values of elements of the first quantization table, the second quantization table including elements respectively corresponding to the elements of the first quantization table;
- and
- re-encoding a reconstructed image by using the second quantization table, the reconstructed image being obtained by decoding the encoded image by using the first quantization table.
A re-encoding apparatus comprising:
- a quantization table obtainer configured to obtain a first quantization table from a bitstream including an image encoded using the first quantization table, and obtain a second quantization table based on a pattern representing a size distribution of values of elements of the first quantization table, the second quantization table including elements respectively corresponding to the elements of the first quantization table;
- and
- a re-encoder configured to re-encode a reconstructed image by using the second quantization table, the reconstructed image being obtained by decoding the encoded image by using the first quantization table.
Dependencies are inferred from the claim text.