JP2009005417A5 - - Google Patents

Claims (5)

In an encoding device for encoding image data,
An acquisition means for analyzing the image data and acquiring statistical information indicating characteristics of the image data;
The degree of difficulty in encoding the image data based on the conversion coefficient for converting the subjective impression of the image pattern into the degree of encoding difficulty and the amount of generated code obtained by encoding the image data Encoding difficulty level calculating means for calculating
Delay means for delaying the image data by a predetermined time;
Based on the total usable data capacity determined by the data capacity of the storage medium or the transfer rate of the transmission path and the encoding difficulty calculated by the encoding difficulty calculation means, the image data delayed by the delay means An allocated code amount calculating means for calculating an allocated code amount to be allocated when encoding;
Encoding means for encoding the image data delayed by the delay means according to the assigned code quantity calculated by the assigned code quantity calculation means;
An encoding device. The encoding apparatus according to claim 1, wherein the encoding difficulty level calculating unit calculates the encoding difficulty level by multiplying the transform coefficient and the generated code amount. The encoding apparatus according to claim 1, wherein the allocation code amount calculation means calculates the allocation code amount in units of pictures or macroblocks. The encoding apparatus according to claim 1, wherein the delay means delays the image data in GOP units. In an encoding method for encoding image data,
An analysis step of analyzing the image data and acquiring statistical information indicating the characteristics of the image data;
The degree of difficulty in encoding the image data based on the conversion coefficient for converting the subjective impression of the image pattern into the degree of encoding difficulty and the amount of generated code obtained by encoding the image data Encoding difficulty calculation step for calculating
A delay step of delaying the image data by a predetermined time;
Based on the total usable data capacity determined by the data capacity of the storage medium or the transfer rate of the transmission path and the encoding difficulty calculated by the encoding difficulty calculation means, the image data delayed by the delay process is An allocation code amount calculation step for calculating an allocation code amount to be allocated when encoding;
An encoding step for encoding the image data delayed by the delay step according to the allocation code amount calculated by the allocation code amount calculation step;
An encoding method comprising: