Image coding/recording apparatus and image coding/recording method

摘要

The invention provides an image coding/recording apparatus which can solve problems of large processing loads due to the real-time re-coding and problems of complicated controls and circuits for returning processing. The image coding/recording apparatus according to an aspect of the invention codes and records image data. The image coding/recording apparatus includes: a coding unit operable to code the image data; a recording unit operable to record the coded data; and a re-coding control unit operable to (i) control said coding unit to re-code the coded data recorded by said recording unit and does not satisfy a predetermined condition, so that the re-coded data satisfies the predetermined condition, and (ii) control said recording unit to record the re-coded data, so that the re-coded data and non-re-coded data are reproduced consecutively.

主权项

1. An image coding and recording apparatus which codes and records image data based on a predetermined coding standard, said apparatus comprising:
a coding unit operable to (i) code the image data on a block-by-block basis defined by the predetermined coding standard so as to generate a first coded stream, and (ii) re-code, after decoding at least one block in the first coded stream, the at least one block so as to generate a second coded stream different from the first coded stream; a recording unit operable to record the first coded stream generated by said coding unit; and a re-coding control unit operable to obtain a violation block from the first coded stream recorded by said recording unit, the violation block being a block having a coding amount exceeding a maximum coding amount defined by the predetermined coding standard, wherein said coding unit is operable to:
(i) even when the violation block occurs in the coding of the image data, complete the coding of the image data without re-coding the violation block so as to generate the first coded stream including the violation block; and(ii) when said re-coding control unit obtains the violation block from the first coded stream recorded by said recording unit, re-code partial data including at least the violation block in the first coded stream, and generate the second coded stream including only one or more blocks each having a coding amount smaller than the maximum coding amount defined by the predetermined coding standard, and wherein said recording unit is configured to:
(i) record the second coded stream together with the first coded stream; and(ii) record control information defining that the second coded stream is reproduced, in a process of reproducing the first coded stream, instead of the partial data during reproduction the partial data.