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Image processing apparatus and image processing method for inhibiting application of an offset to pixels of an image

專利號(hào)
US11039133B2
公開日期
2021-06-15
申請(qǐng)人
SONY CORPORATION（JP Tokyo）
發(fā)明人
Yusuke Miyagi; Yoshitaka Morigami
IPC分類
H04N19/117; H04N19/157; H04N19/176; H04N19/42
技術(shù)領(lǐng)域
image,skip,prediction,offset,in,adaptive,filter,data,section,sao
地域： Tokyo

摘要

A filter processing section 352 performs a filter process for applying an offset to pixels of a decoded image. A filter controller 351 inhibits the offset from being applied to an edge portion depending on occurrence of a transform unit in a transformation skip mode in which orthogonal transformation is not performed on a predicted residual. Furthermore, the filter controller 351 determines whether an offset for gradation adjustment using the decoded image is to be applied in the filter processing section 352 or not, and sets an offset in case the offset is to be applied. It is possible to make less conspicuous in the boundary between a transform unit where orthogonal transformation is performed by the offset for gradation adjustment and the transform unit where orthogonal transformation is skipped. The image quality of the decoded image is restrained from being lowered.

說(shuō)明書

3. APPLICATION EXAMPLES

Next, application examples of the image processing apparatus according to the present technology will be described below.

First Application Example: Television Receiver

FIG. 21 is a diagram illustrating, by way of example, a general configuration of a television apparatus to which the image processing apparatus described above is applied. The television apparatus 900 includes an antenna 901, a tuner 902, a demultiplexer 903, a decoder 904, a video signal processor 905, a display 906, an audio signal processor 907, a speaker 908, an external interface 909, a controller 910, a user interface 911, and a bus 912.

The tuner 902 extracts a signal in a desired channel from a broadcast signal received through the antenna 901, and demodulates the extracted signal. Then, the tuner 902 outputs a coded bit stream obtained by the demodulation to the demultiplexer 903. In other words, the tuner 902 serves the role as transmitting means in the television apparatus 900, for receiving a coded stream where images are coded.

The demultiplexer 903 separates a video stream and an audio stream of a program to be viewed from the coded hit stream, and outputs the separated streams to the decoder 904. Furthermore, the demultiplexer 903 extracts auxiliary data such as EPG (Electronic Program Guide) or the like from the coded bit stream, and supplies the extracted data to the controller 910. In addition, in case the coded bit stream is scrambled, the demultiplexer 903 may descramble the coded bit stream.

權(quán)利要求

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