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AssigneeNippon Telegraph and Telephone Corporation
InventorsAtsushi Shimizu, Ryuichi Tanida
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An encoding bit-rate control method used in video encoding in which intraframe prediction and interframe prediction are switchably used. The method includes measuring an amount of code generated for quantized information and an amount of code generated for non-quantized information for the picture which has been encoded; computing a ratio of the amount of code generated for the non-quantized information to the total amount of generated code, based on the above measured amounts of code; and determining a target amount of code of an encoding target picture by using the computed ratio of the amount of code generated for the non-quantized information. The target amount of code may be determined by computing a complex index for the quantized information of the picture which has been encoded, and estimating an amount of code generated when the encoding target picture is encoded using a predetermined assumed quantization step size, based on the above index and the ratio of the amount of code generated for the non-quantized information.
An encoding bit-rate control method used in video encoding in which intraframe prediction and interframe prediction are switchably used, the method comprising the steps of:
An encoding bit-rate control apparatus used in video encoding in which intraframe prediction and interframe prediction are switchably used, the apparatus comprising:
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