Abstract: According to certain embodiment, there is provided a moving image encoding apparatus in which a first encoding unit performs a first encoding process on an input image to generate first encoded data and to perform a first decoding process on the first encoded data to generate a first decoded image, a difference calculating unit generates a difference image between the input image and the first decoded image, a first pixel range converting unit converts pixel values of the difference image to be within a first specific range to generate a first converted image, a second encoding unit performs a second encoding process on the first converted image to generate second encoded data, the second encoding process being different from the first encoding process and the first specific range is a range including a range of pixel values that can be encoded by the second encoding unit.

Abstract: According to an embodiment, an image coding method is for coding an image including a luminance component and color difference components. The method includes acquiring a reference image; and generating a predicted image by interpolating the luminance component and the color difference components in the reference image according to a motion vector. If a size of a block, which is designated as a unit of the interpolation, is equal to or smaller than a predetermined first threshold value, the generating includes inhibiting a bi-directional prediction, and performing only a uni-directional prediction to generate the predicted image according to the motion vector.

Abstract: According to one embodiment, disclosed is a method of dividing an input image signal into pixel blocks, and performing inter-prediction on the divided pixel blocks. This method includes selecting predicted motion information from a motion information buffer storing motion information in an encoded region, and predicting motion information of an encoding target block by using the predicted motion information. The method further includes acquiring representative motion information from a plurality of items of motion information in an encoded region in accordance with first information indicating a method of selecting the predicted motion information, thereby obtaining only the representative motion information.

Abstract: In one embodiment, an image encoding apparatus converts bit depth of an input image formed of a plurality of pixels each having an N bit depth into an (N+M) bit depth larger than N bit depth by M bits. An adaptive bit depth converter converts the bit depth of each pixel of the decoded image of the (N+M) bits into the N bits selectively using one of a plurality of conversion systems. The converted image of the N bit depth is stored in a frame memory as a reference image. The bit depth of each pixel of the reference image of the N bit depth read out from the frame memory is converted into the (N+M) bit depth larger than the N bit depth by M bits in accordance with the conversion system by a pixel bit depth inverse converter.

Abstract: In one embodiment, a moving image decoding apparatus includes a decoder and a processor. The decoder decodes an encoded data to obtain a filter information, an application information with a value appended to a head of the application information, a block division information indicating how to divide an image to be decoded into blocks, and a quantized transform coefficient, the value indicates the number of blocks to which filter is applied. The processor generates a reconstructed image by applying the filter to the block in a decoded image if the application information indicates the block to be applied the filter, the decoded image is obtained by adding a prediction error to a prediction image.

Abstract: A digital watermark embedding apparatus includes: an extractor configured to extract a specific frequency component from each of N kinds of scaled images about an input image signal to generate N kinds of extracted signals; a generator configured to compress the amplitude of the respective extracted signals on the basis of N kinds of to-be-embedded information corresponding to the N kinds of extracted signals to generate watermark image signals by shifting the predetermined phases; and a superimposer configured to add the N kinds of watermark image signals to the input image signal to generate an output image signal.

Abstract: In one embodiment, an image encoding apparatus converts bit depth of an input image formed of a plurality of pixels each having an N bit depth into an (N+M) bit depth larger than N bit depth by M bits. An adaptive bit depth converter converts the bit depth of each pixel of the decoded image of the (N+M) bits into the N bits selectively using one of a plurality of conversion systems. The converted image of the N bit depth is stored in a frame memory as a reference image. The bit depth of each pixel of the reference image of the N bit depth read out from the frame memory is converted into the (N+M) bit depth larger than the N bit depth by M bits in accordance with the conversion system by a pixel bit depth inverse converter.

Abstract: In generation of a system header included in an program stream of extended MPEG-2 Systems, when a basic stream ID is an extension ID and basic buffer size information represents 0 byte, extension buffer size information expressed by a total of 24 bits of an extension ID, a marker bit and an extension stream ID and a total of 24 bits including an extension stream ID, a marker bit and extension buffer bound scale information and required for reproduction of an elementary stream to be multiplexed using a pair of an extension ID and an extension stream ID is generated and recorded.

Abstract: A digital watermark embedding apparatus includes a scaling unit configured to scale at least a specific frequency component of an input image signal to generate a scaled image signal, a control unit configured to control at least one of a phase and amplitude of the scaled image signal in accordance with watermark information to generate a controlled image signal, and a combiner to combine the input image signal and the controlled image signal to generate an output image signal embedded with the watermark information.

Abstract: A moving image encoding method includes outputting encoded data that comprises an image code sequence corresponding to slices of a moving image and first timing information indicating times at which the slices are to be decoded.

Abstract: A digital watermark embedding apparatus includes a scaling unit configured to scale at least a specific frequency component of an input image signal to generate a scaled image signal, a control unit configured to control at least one of a phase and amplitude of the scaled image signal in accordance with watermark information to generate a controlled image signal, and a combiner to combine the input image signal and the controlled image signal to generate an output image signal embedded with the watermark information.

Abstract: A digital watermark embedding apparatus includes a scaling unit configured to scale at least a specific frequency component of an input image signal to generate a scaled image signal, a control unit configured to control at least one of a phase and amplitude of the scaled image signal in accordance with watermark information to generate a controlled image signal, and a combiner to combine the input image signal and the controlled image signal to generate an output image signal embedded with the watermark information.

Abstract: A digital watermark detection apparatus includes an extraction unit extracting a specific frequency component signal from an input image signal, a first transformation unit orthogonal-transforming the image signal, a second transformation unit orthogonal-transforming the specific frequency component signal, a combination unit combining first and second transformed image signals from the first and second transformation units, a third transformation unit orthogonal-transforming a combined image signal, an estimation unit estimating embedded watermark information by searching for a peak appearing in a third transformed image signal of the third transformation unit, and a compressor compressing a target signal in amplitude based on a compression characteristic varying according to an amplitude and frequency of the target signal to obtain a compression signal, the target signal formed of at least one of the first transformed image signal, the second transformed image signal and the combined image signal.

Abstract: There is provided a digital watermarking detecting device that can accurately detect watermarking information weakened by an attack such as image cut-out, scaling or the like without increasing a calculation amount and a circuit scale.

Abstract: A rendering device to render a contents data comprises a reader, an information acquisition unit and a controller. The reader reads the contents data. The information acquisition unit acquires a copy control information. The controller controls rendering of the contents data while updating the acquired copy control information.

Abstract: In generation of a system header included in an program stream of extended MPEG-2 Systems, when a basic stream ID is an extension ID and basic buffer size information represents 0 byte, extension buffer size information expressed by a total of 24 bits of an extension ID, a marker bit and an extension stream ID and a total of 24 bits including an extension stream ID, a marker bit and extension buffer bound scale information and required for reproduction of an elementary stream to be multiplexed using a pair of an extension ID and an extension stream ID is generated and recorded.

Abstract: A digital watermark embedding apparatus includes a detector detecting a signal characteristic of at least one of an input image signal and the output image signal, and a controller controlling an embedding intensity of a digital watermark signal with respect to the input image signal in accordance with the signal characteristic.

Abstract: A digital watermark embedding apparatus includes: an extractor configured to extract a specific frequency component from each of N kinds of scaled images about an input image signal to generate N kinds of extracted signals; a generator configured to compress the amplitude of the respective extracted signals on the basis of N kinds of to-be-embedded information corresponding to the N kinds of extracted signals to generate watermark image signals by shifting the predetermined phases; and a superimposer configured to add the N kinds of watermark image signals to the input image signal to generate an output image signal.

Abstract: According to one embodiment, an information encoding method generates main image information from input image information by applying noise reduction processing to the input image information, estimates noise image information included in the input image information from the input image information and the main image information to generate first model information corresponding to the noise image information, corrects a parameter which does not satisfy a predetermined condition of a plurality of parameters included in the first model information to generate second model information including the plurality of parameters which reflect the correction, encodes the main image information to generate encoded image information, and generates encoded information including the encoded image information, the first model information, and the second model information.

Abstract: An image size reduction unit reduces the image size of an input image signal, thereby generating a size-reduced image signal. A specific frequency component extraction unit extracts a specific frequency component signal from the size-reduced image signal. A phase controller controls the phase of the specific frequency component signal. A correlator computes a cross-correlation value between the phase-controlled specific frequency component signal and size-reduced image signal. A watermark information estimation unit estimates, from the cross-correlation value, watermark information embedded in the input image signal.