Image processing device and image processing method
AssigneeVelos Media, LLC
InventorJunichi TANAKA
Life of this patent
Estimating the term…
Abstract
An image processing device including an acquiring section configured to acquire quantization matrix parameters from an encoded stream in which the quantization matrix parameters defining a quantization matrix are set within a parameter set which is different from a sequence parameter set and a picture parameter set, a setting section configured to set, based on the quantization matrix parameters acquired by the acquiring section, a quantization matrix which is used when inversely quantizing data decoded from the encoded stream, and an inverse quantization section configured to inversely quantize the data decoded from the encoded stream using the quantization matrix set by the setting section.
Claims14
An image processing device comprising:
- circuitry configured to:
- determine whether or not a current quantization matrix is to be generated by copying a source quantization matrix, wherein the current quantization matrix comprises a second identification value;
- in a case where the current quantization matrix is to be generated by copying the source quantization matrix, encode a first information into a bit stream, wherein the first information indicates the current quantization matrix is to be generated by copying the source quantization matrix;
- determine whether a default matrix is to be used as the source quantization matrix;
- in a case where the default matrix is to be used as the source quantization matrix, set a first identification value equal to the second identification value;
- in a case where the default matrix is not to be used as the source quantization matrix, set the first identification value not equal to the second identification value such that the source quantization matrix can be identified based at least in part on the first identification value, and based on one or more or none of:
- a matrix size and a matrix type;
- encode, into the bit stream, a second information which is indicative of the first identification value;
- and
- encode an image using the current quantization matrix to form part of the bit stream.
An image processing method comprising the steps of:
- determining whether or not a current quantization matrix is to be generated by copying a source quantization matrix, wherein the current quantization matrix comprises a second identification value;
- in the case where the current quantization matrix is to be generated by copying the source quantization matrix, encoding a first information into a bit stream, wherein the first information indicates the current quantization matrix is to be generated by copying the source quantization matrix;
- determining whether a default matrix is to be used as the source quantization matrix;
- in a case where the default matrix is to be used as the source quantization matrix, setting a first identification value equal to the second identification value;
- in a case where the default matrix is not to be used as the source quantization matrix, setting a first identification value not equal to the second identification value such that the source quantization matrix can be identified based at least in part on the first identification value, and based on one or more or none of:
- a matrix size and a matrix type;
- encoding, into the bit stream, a second information which is indicative of the first identification value;
- and,
- encoding an image using the current quantization matrix to form part of the bit stream.
Dependencies are inferred from the claim text.