IMAGE PROCESSING DEVICE AND IMAGE PROCESSING METHOD
First Claim
1. An image processing device comprising:
- a basic quantizing factor determining unit configured to determine a basic quantizing factor regarding which is predicted that the generated code quantity for each image increment when encoding an input image will approximate to the target code quantity for said each image increment;
an encoding unit configured to encode said input image for each feedback control increment by executing quantization using a usage quantizing factor determined based on at least said basic quantizing factor; and
a feedback control unit configured to confirm the generated code quantity of said input image encoded by said encoding unit for said each feedback control increment, and in the case of predicting that the generated code quantity for said each image increment will exceed the target code quantity for said each image increment, increase said usage quantizing factor.
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Accused Products
Abstract
The present invention can suppress the generated code quantity for each image increment so as not to exceeding the target code quantity without having a usage quantizing factor deviate greatly in a sure manner.
An image encoding device (200) determines a basic quantization parameter (QPMB) serving as a basic quantizing factor to be predicted in the case that the main encoding generated code comes near the target code quantity at the time of encoding an input image (91). The image encoding device (200) encodes the input image (91) for each feedback control increment by executing quantization using an adapted quantization parameter (QPt) based on an average quantization parameter BaseQP serving as a usage quantizing factor determined based on at least the basic quantization parameter (QPMB). The image encoding device (200) confirms the generated code quantity of the encoded input image (91) for each feedback control increment, and in the case of predicting that the generated code quantity for each image increment will exceed the target code quantity, increases the value of the adapted quantization parameter (QPt) by increasing the average quantization parameter BaseQP.
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Citations
15 Claims
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1. An image processing device comprising:
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a basic quantizing factor determining unit configured to determine a basic quantizing factor regarding which is predicted that the generated code quantity for each image increment when encoding an input image will approximate to the target code quantity for said each image increment; an encoding unit configured to encode said input image for each feedback control increment by executing quantization using a usage quantizing factor determined based on at least said basic quantizing factor; and a feedback control unit configured to confirm the generated code quantity of said input image encoded by said encoding unit for said each feedback control increment, and in the case of predicting that the generated code quantity for said each image increment will exceed the target code quantity for said each image increment, increase said usage quantizing factor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An image processing method comprising:
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a basic quantizing factor determining step arranged to determine a basic quantizing factor regarding which is predicted that the generated code quantity for each image increment when encoding an input image will approximate to the target code quantity for said each image increment; an encoding step arranged to encode said input image for each feedback control increment to generate an encoded stream by executing quantization using a usage quantizing factor determined based on at least said basic quantizing factor; and a feedback control step arranged to confirm the generated code quantity of said input image encoded in said encoding step for said each feedback control increment, and in the case of predicting that the generated code quantity for said each image increment will exceed the target code quantity for said each image increment, increase said usage quantizing factor.
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Specification