Video encoding device, video encoding method, and video encoding program
AssigneeNEC Corporation
InventorsHirofumi Aoki, Yuzo Senda
Life of this patent
Estimating the term…
Abstract
A video encoding device includes a re-encoding picture type judgment unit which judges whether a picture is to be taken as a reference picture or not in a subsequent re-encoding process, and a refresh unit sets no refreshed unit area in the picture when the picture is judged by the re-encoding picture type judgment unit to be taken as a non-reference picture in the subsequent re-encoding process, but sets, when the picture is judged to be taken as a reference picture, a refreshed unit area in the picture to be taken as a reference picture so as to include an area corresponding to a refreshed unit area which should have been set in a picture to be taken as a non-reference picture.
Claims13
A video encoding device for inter-coding or intra-coding image data in an input video image to form an encoded picture, the video encoding device comprising:
- a prediction error generation unit which generates a prediction error signal from image data and a predicted value generated by an inter-prediction part or an intra-prediction part;
- a quantization unit which quantizes the prediction error signal generated by the prediction error generation unit;
- a re-encoding picture type judgment unit which judges whether a picture is to be taken as a reference picture or not in a re-encoding process executed in a post-stage of the video encoding device;
- and
- a refresh unit which refreshes such that a partial area in a picture is assumed as a refreshed unit area and the refreshed unit area is moved on a picture-by-picture basis, wherein:
- the refresh unit sets no refreshed unit area in the picture when the picture is judged by the re-encoding picture type judgment unit to be taken as a non-reference picture in the re-encoding process, but sets, when the picture is judged to be taken as a reference picture, the refreshed unit area in the picture to be taken as a reference picture so as to include an area corresponding to a refreshed unit area which should have been set in a picture to be taken as a non-reference picture.
A video encoding method for inter-coding or intra-coding image data in an input video image to form an encoded picture, the video encoding method comprising:
- generating a prediction error signal from image data and a predicted value generated by an inter-prediction process or an intra-prediction process;
- quantizing the prediction error signal thus generated;
- judging whether a picture is to be taken as a reference picture or not in a re-encoding process executed in a post-stage of a device performing the video encoding method;
- refreshing such that a partial area in a picture is assumed as a refreshed unit area and the refreshed unit area is moved on a picture-by-picture basis;
- and
- setting no refreshed unit area in the picture when the picture is judged to be taken as a non-reference picture in the re-encoding process, but setting, when the picture is judged to be taken as a reference picture, the refreshed unit area in the picture to be taken as a reference picture so as to include an area corresponding to a refreshed unit area which should have been set in a picture to be taken as a non-reference picture.
A non-transitory computer readable information recording medium storing a video encoding program, causing a computer for inter-coding or intra-coding image data in an input video image to form an encoded picture, performs a method for
- generating a prediction error signal from image data and a predicted value generated by an inter-prediction process or an intra-prediction process;
- quantizing the prediction error signal thus generated;
- judging whether a picture is to be taken as a reference picture or not in a re-encoding process executed in a post-stage of a device performing the method;
- refreshing such that a partial area in a picture is assumed as a refreshed unit area and the refreshed unit area is moved on a picture-by-picture basis;
- and
- setting no refreshed unit area in the picture when the picture is judged to be taken as a non-reference picture in the re-encoding process, but setting, when the picture is judged to be taken as a reference picture, the refreshed unit area in the picture to be taken as a reference picture so as to include an area corresponding to a refreshed unit area which should have been set in a picture to be taken as a non-reference picture.
Dependencies are inferred from the claim text.