Back to results
US 2009/0154554 A1Published application
Moving picture coding method and moving picture decoding method
AssigneePanasonic Corporation
InventorsShinya KADONO, Satoshi Kondo, Makoto Hagai
Life of this patent
Estimating the term…
Abstract
A moving picture coding apparatus 1 includes a counter unit 102 which counts the number of pictures following an intra coded picture; and a motion estimation unit 101 which compares respectively only reference pictures which are the intra coded picture or the following pictures, selected from among a reference picture Ref1, a reference picture Ref2 and a reference picture Ref3 stored in memories 408-410, with a picture signal Vin, and determines the reference picture whose inter picture differential value is smallest.
Claims4
1-24. (canceled)
A moving picture decoding method for decoding a coded picture,
- wherein in said moving picture decoding method, a picture is decoded by one of an intra picture decoding method and an inter picture decoding method, and
- when a picture is decoded by the inter picture decoding method, at least one of the following pictures is selected as a reference picture:
- an intra decoded picture which is decoded by the intra picture decoding method;
- a picture located before the intra decoded picture in display order;
- and a picture located after the intra decoded picture in display order,
- said moving picture decoding method comprises:
- decoding a coded picture to obtain a decoded picture;
- decoding information indicating that the intra decoded picture is specified as a specified picture which is used for restricting selection of the reference picture;
- and
- specifying the decoded picture as the specified picture based on the information;
- wherein,
- in case where the decoded picture is specified as the specified picture in said specifying, for a picture to be decoded by the inter picture decoding method after the specified picture,
- at least one of the following pictures is selected as the reference picture in said decoding of the coded picture:
- the specified picture and a picture which is decoded after the specified picture, while a picture which has been decoded before the specified picture is prohibited from selecting as the reference picture, and
- in case where the decoded picture is an intra decoded picture which is not specified as the specified picture in said specifying, for a picture to be decoded by the inter picture decoding method after the intra decoded picture which is not specified as the specified picture,
- at least one of the following pictures is selected as the reference picture in said decoding of the coded picture:
- the intra decoded picture which is not specified as the specified picture, a picture located before, in display order, the intra decoded picture which is not specified as the specified picture, and a picture located after, in display order, the intra decoded picture which is not specified as the specified picture.
14 more elements
A moving picture decoding apparatus which decodes a coded picture,
- wherein in said moving picture decoding apparatus, a picture is decoded by one of an intra picture decoding unit and an inter picture decoding unit, and
- when a picture is decoded by the inter picture decoding unit, at least one of the following pictures is selected as a reference picture:
- an intra decoded picture which is decoded by the intra picture decoding unit;
- a picture located before the intra decoded picture in display order;
- and a picture located after the intra decoded picture in display order,
- said moving picture decoding apparatus comprises:
- a decoding unit operable to decode a coded picture to obtain a decoded picture, and to decode information indicating that the intra decoded picture is specified as a specified picture which is used for restricting selection of the reference picture;
- and
- a specifying unit operable to specify the decoded picture as the specified picture based on the information,
- wherein,
- in case where the decoded picture is specified as the specified picture in said specifying unit, for a picture to be decoded by the inter picture decoding unit after the specified picture,
- at least one of the following pictures is selected as the reference picture in said decoding unit:
- the specified picture and a picture which is decoded after the specified picture, while a picture which has been decoded before the specified picture is prohibited from being selected as the reference picture, and
- in case where the decoded picture is an intra decoded picture which is not specified as the specified picture in said specifying unit, for a picture to be decoded by the inter picture decoding unit after the intra decoded picture which is not specified as the specified picture,
- at least one of the following pictures is selected as the reference picture in said decoding unit:
- the intra decoded picture which is not specified as the specified picture, a picture located before, in display order, the intra decoded picture which is not specified as the specified picture, and a picture located after, in display order, the intra decoded picture which is not specified as the specified picture.
13 more elements
Dependencies are inferred from the claim text.