JP2007325119A5

JP2007325119A5 -

Info

Publication number: JP2007325119A5
Application number: JP2006155175A
Authority: JP
Filing date: 2006-06-02
Publication date: 2009-07-16
Anticipated expiration: 2026-06-02

Claims

An image processing method for performing motion compensation predictive coding using image data of different frames as a reference picture,
A reference list comprising a plurality of reference pictures, wherein an internal reference picture is updated by a picture obtained by decoding an encoded picture at an arbitrary frame interval;
After the reference list is updated, the reference in motion compensated prediction is performed for a series of a plurality of encoding target pictures from the next encoding target picture to the encoding target picture used for the next update of the reference list. An image processing method characterized in that processing for searching a plurality of reference pictures in a list is performed in parallel.

The image processing method according to claim 1, wherein the pictures to be encoded include an I picture that does not perform motion compensation prediction, a P picture that performs forward prediction, and a B picture that performs bidirectional prediction.

When there are p reference pictures referenced for motion compensation prediction in the reference list and m of the series of encoding target pictures (p and m are arbitrary natural numbers), m codes 3. The image processing method according to claim 1, wherein the amount of data read from the reference list is a maximum of p pictures for performing motion compensation prediction of a target picture.

The I picture and P picture are periodically set at predetermined intervals.
The reference picture in the reference list is periodically updated by a picture obtained by decoding the encoded picture after encoding the I picture or the P picture.
After the reference list is updated, motion compensation prediction is performed on a series of a plurality of encoding target pictures from a B picture to be encoded next to an I picture or a P picture to be used for updating the reference list next. The image processing method according to claim 2, wherein the image processing is performed in parallel.

When there are p reference pictures referred to for motion compensation prediction in the reference list and the interval between the I picture and P picture is m (p and m are arbitrary natural numbers), m pictures 5. The image processing method according to claim 4, wherein the amount of data read from the reference list is a maximum of p pictures in order to perform motion compensation prediction of the current picture to be encoded.

An image processing method for performing motion compensation predictive coding using image data of different frames as a reference picture,
The pictures to be encoded include an I picture that does not perform motion compensation prediction, a P picture that performs forward prediction, and a B picture that performs bidirectional prediction.
The reference picture stored in the frame memory is updated with a picture obtained by decoding the encoded picture after encoding the I picture, the P picture or a part of the B picture,
After the contents of the frame memory are updated, motion compensated prediction is performed for a series of a plurality of encoding target pictures from the next encoding target picture to the encoding target picture used for updating the contents of the frame memory next. An image processing method comprising: encoding in parallel processing for searching for a plurality of reference pictures stored in the frame memory.

When there are two reference pictures referenced for motion compensation prediction in the frame memory and m of the series of plural encoding target pictures (m is an arbitrary natural number), m encoding targets 7. The image processing method according to claim 6, wherein the amount of data read from the frame memory for performing motion compensation prediction of a picture is a maximum of two pictures.

One macroblock for which motion compensation prediction is performed for each encoding target picture is selected, and a search range common to the selected macroblock is read from each reference picture, and motion compensation prediction is performed for each search range of each macroblock. And
After motion compensated prediction of all macroblocks is completed, the next macroblock is selected from each encoding target picture, and image data is read from each reference picture according to the search range common to the next macroblock, 8. The motion compensation prediction is performed in parallel for a plurality of encoding target pictures by sequentially repeating the motion compensation prediction for the search range of each of the following macroblocks. The image processing method according to item.

An image processing apparatus using the image processing method according to any one of claims 1, 4, and 6,
Memory means for storing image data of a reference picture;
An image processing apparatus comprising: an encoding unit that performs an encoding process including the motion compensation prediction.

An image processing method for performing motion compensation predictive coding using image data of different frames as a reference picture,
A storage step of storing a plurality of the reference pictures in a storage means;
After updating the reference picture stored in the storage means, it corresponds to a plurality of encoding target picture macroblocks from the next encoding target picture to the next encoding target picture stored as a reference picture in the storage means. A reading step of reading image data of a common search range from each of a plurality of reference pictures stored in the storage unit;
A coding step for performing coding by performing motion compensation prediction in parallel for the macroblocks of the plurality of coding target pictures using the image data in the common search range read in the reading step. An image processing method.

11. The image processing method according to claim 10, wherein the common search range is a range in which each search range for each macroblock of the plurality of encoding target pictures is included.

In the encoding step, motion compensation prediction is performed using image data corresponding to the search range of the macroblock of each encoding target picture among the image data in the common search range read in the reading step. 12. The image processing method according to claim 10, wherein the image processing method is characterized in that

An image processing apparatus that performs motion compensation prediction coding using image data of different frames as a reference picture,
Storage means for storing a plurality of the reference pictures;
After updating the reference picture stored in the storage means, it corresponds to a plurality of encoding target picture macroblocks from the next encoding target picture to the next encoding target picture stored as a reference picture in the storage means. Reading means for reading out image data of a common search range from each of a plurality of reference pictures stored in the storage means;
And coding means for performing motion-compensated prediction in parallel on the macroblocks of the plurality of coding target pictures using the image data in the common search range read by the reading means. An image processing apparatus.

A program for causing a computer to execute image processing for performing motion compensation prediction encoding using image data of different frames as a reference picture,
A storage step of storing a plurality of the reference pictures in a storage means;
After updating the reference picture stored in the storage means, it corresponds to a plurality of encoding target picture macroblocks from the next encoding target picture to the next encoding target picture stored as a reference picture in the storage means. A reading step of reading image data of a common search range from each of a plurality of reference pictures stored in the storage unit;
Using the image data in the common search range read in the reading step, the computer executes a coding step of performing motion-compensated prediction in parallel for the macroblocks of the plurality of coding target pictures. Program for.

15. A computer-readable recording medium on which the program according to claim 14 is recorded.