Coding control method, coding control apparatus and storage medium containing coding control program

A coding control apparatus deciding, in coding motion picture data formed by a plurality of frames on the basis of a generated information amount being the amount of coded data generated by coding one frame or an occupied amount in a smoothing buffer used for transmission of data after coding, a quantization characteristic employed for coding a next frame to said one frame, comprising:

• detection means for detecting, on the basis of a motion quantity of an object expressed by said motion picture, data either one or both of a motion start state of said object and a motion end state of said object;
• and
• quantization control means for deciding, on the basis of said generated information amount or said occupied amount and a detection result by said detection means, said quantization characteristic employed for coding said next frame.

A coding control method employed in coding data formed by a plurality of frames on the basis of a generated information amount being the amount of coded data generated by coding one frame or an occupied amount in a smoothing buffer used for transmission of data after coding, for deciding a quantization characteristic employed for coding a next frame to said one frame, comprising:

• a comparison step of comparing said generated information amount or said occupied amount with a predetermined value;
• and
• a quantization characteristic decision step of dividing each frame of said plurality of frames previously into a plurality of areas while classifying said plurality of areas in said each frame into a first group and a second group for in response to a comparison result by said comparison step setting the same quantization characteristic for said first and second groups or setting one of most approximate two different quantization characteristics for said first group and the other one for said second group respectively.

A coding control method for deciding, in coding motion picture data formed by a plurality of frames, on the basis of a generated information amount being the amount of coded data generated by coding one frame or an occupied amount in a smoothing buffer used for transmission of data after coding, a quantization characteristic employed for coding a next frame to said one frame, comprising:

• a detection step of detecting, on the basis of a motion quantity of an object expressed by said motion picture data, either one or both of a motion start state of said object and a motion end state of said object;
• and
• quantization control step of deciding, on the basis of said generated information amount or said occupied amount and a detection result by said detection step, said quantization characteristic employed for coding said next frame.

A storage medium containing a coding control program deciding, in coding data formed by a plurality of frames on the basis of a generated information amount which is the amount of coded data generated by coding one frame or an occupied amount in a smoothing buffer used for transmission of data after coding, a quantization characteristic employed in coding of a next frame to the one frame as a program executed in a computer unit, wherein said coding control program implementing on the computer unit an operating environment which includes:

• comparison step of comparing the generated information amount or the occupied amount with a predetermined value, and
• quantization characteristic decision step of dividing each frame of the plurality of frames previously into a plurality of areas while classifying the plurality of areas in each frame into a first group and a second group for setting in response to a comparison result by the comparison steps the same quantization characteristic for the first and second groups or setting one of most approximate two different quantization characteristics for the first group and the other one for the second group respectively.

A storage medium containing a coding control program deciding, in coding motion picture data formed by a plurality of frames on the basis of a generated information amount which is the amount of coded data generated by coding one frame or an occupied amount in a smoothing buffer used for transmission of data after coding, a quantization characteristic employed in coding of a next frame to the one frame as a program executed in a computer unit, wherein said coding control program implementing on the computer unit an operating environment which includes:

• a detection step of detecting, on the basis of a motion quantity of an object expressed by the motion picture data, either one or both of a motion start state of the object and a motion end state of the object, and
• a quantization control step of deciding, on the basis of the generated information amount or the occupied amount and a detection result by said detection step, the quantization characteristic employed in coding of the next frame.