Image coder and image decoder capable of power-saving control in image compression and decompression
First Claim
Patent Images
1. An image decoder comprising:
- a code decompression/decoding unit to decode code data produced through compression and encoding of image data;
a power supply state detection unit to detect a current state of a power supply of the image decoder; and
a controller to control the code decompression/decoding unit based on the current state of the power supply so as to reduce power consumption in performing decompression and decoding of the code data.
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Abstract
An image decoder comprises a code decompression/decoding unit that decodes code data produced through compression and encoding of image data, a power supply state detection unit that detects a current state of a power supply of the image decoder, and a controller that controls the code decompression/decoding unit based on the current state of the power supply so as to reduce power consumption in performing decompression and decoding of the code data.
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Citations
31 Claims
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1. An image decoder comprising:
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a code decompression/decoding unit to decode code data produced through compression and encoding of image data;
a power supply state detection unit to detect a current state of a power supply of the image decoder; and
a controller to control the code decompression/decoding unit based on the current state of the power supply so as to reduce power consumption in performing decompression and decoding of the code data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. An image coder comprising:
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an image compression/encoding unit to perform compression and encoding of an image;
a power supply state detector to detect a current state of a power supply of the image coder; and
a first mode setting unit to select a processing mode for compression/encoding rate control in accordance with the current state of the power supply. - View Dependent Claims (17, 18, 19, 27, 28, 29, 30, 31)
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20. An image coder comprising:
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an image compression/encoding unit to divide an image into a plurality of tiles through a tiling process and perform compression and encoding of the image in a hierarchical manner for each of the tiles;
a power supply state detector to detect a current state of a power supply of the image coder; and
a first mode setting unit to select a tiling processing mode in accordance with the current state of the power supply. - View Dependent Claims (21)
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22. An image coder comprising:
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an image compression/encoding unit to perform compression and encoding of an image using wavelet transform for frequency transform;
a power supply state detector to detect a current state of a power supply of the image coder; and
a first mode setting unit to select a processing mode of wavelet transform in accordance with the current state of the power supply. - View Dependent Claims (23, 24, 25, 26)
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Specification