US 2002/0118753 A1Published application

Moving picture encoding apparatus and moving picture encoding method

AssigneeKabushiki Kaisha Toshiba

InventorYuji Kawashima

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Abstract

An encoding section can perform moving picture compression processes by intra-coding and inter-coding. In accordance with an instruction from a code production amount control section, the encoding section divides an input VOP to MBs according to one of the moving picture compression processes by intra-coding and inter-coding, and subjects the divided MBs to encoding processing. A code production amount count section counts the code amount of a produced bit stream. A quantization scale mean value calculation section accumulates the quantization scale instructed by the code production amount control section, and calculates a mean value of the quantization scale for each VOP. The code production amount control section switches the encoding process to be carried out by the encoding section to the intra-coding process, on the basis of the code production amount, the mean value of the quantization scale and the frame skip number.

Claims12

Dependent claims

A moving picture encoding apparatus comprising:

a skip number control section which controls a skip number between frames to be encoded;
a quantization scale control section which controls a quantization scale indicative of a degree of quantization;
an encoding section which performs encoding of a moving picture by selectively using one of an inter-coding type process and an intra-coding type process on the basis of the quantization scale determined by the quantization scale control section and the skip number determined by the skip number control section;
a code amount detection section which finds a code amount of a frame encoded by the encoding section;
a storage section which stores the quantization scale with which the encoding section performs encoding by the inter-coding type process, the code amount found by the code amount detection section at this time, the quantization scale with which the encoding section performs encoding by the intra-coding type process, and the code amount found by the code amount detection section at this time;
and
an encoding process setting section which sets the encoding process to be performed by the encoding section to the intra-coding type process, if the skip number determined by the skip number control section is a predetermined first value or more and the quantization scale and code amount stored in the storage section satisfy a predetermined condition.

4 more elements

A moving picture encoding method comprising:

a skip number control step of controlling a skip number between frames to be encoded;
a quantization scale control step of controlling a quantization scale indicative of a degree of quantization;
an encoding step of performing encoding of a moving picture by selectively using one of an inter-coding type process and an intra-coding type process on the basis of the quantization scale determined by the quantization scale control step and the skip number determined by the skip number control step;
a code amount detection step of finding a code amount of a frame encoded by the encoding step;
a storage step of storing the quantization scale with which the encoding step executes encoding by the inter-coding type process, the code amount found by the code amount detection step at this time, the quantization scale with which the encoding step executes encoding by the intra-coding type process, and the code amount found by the code amount detection step at this time;
and
an encoding process setting step of setting the encoding process to be performed by the encoding step to the intra-coding type process, if the skip number determined by the skip number control step is a predetermined first value or more and the quantization scale and code amount stored in the storage step satisfy a predetermined condition.

4 more elements

Dependencies are inferred from the claim text.