Abstract: A specific frequency component extraction unit extracts a specific frequency component signal from an input image signal. A phase controller controls the phase of the specific frequency component signal. A correlator computes the cross-correlation value of the phase-controlled specific frequency component signal and the input image signal. A watermark information estimation unit filters the cross-correlation value to detect watermark information embedded in the input image signal.

Abstract: A specific frequency component extraction unit extracts a specific frequency component signal from an input image signal. A phase controller controls the phase of the specific frequency component signal. A correlator computes the cross-correlation value of the phase-controlled specific frequency component signal and the input image signal. A watermark information estimation unit filters the cross-correlation value to detect watermark information embedded in the input image signal.

Abstract: A specific frequency component extraction unit extracts a specific frequency component signal from an input image signal. A phase controller controls the phase of the specific frequency component signal. A correlator computes the cross-correlation value of the phase-controlled specific frequency component signal and the input image signal. A watermark information estimation unit filters the cross-correlation value to detect watermark information embedded in the input image signal.

Abstract: A specific frequency component extraction unit extracts a specific frequency component signal from an input image signal. A phase controller controls the phase of the specific frequency component signal. A correlator computes the cross-correlation value of the phase-controlled specific frequency component signal and the input image signal. A watermark information estimation unit filters the cross-correlation value to detect watermark information embedded in the input image signal.

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: In a recording medium in which a rewritable video manager and video objects are recorded, the video objects comprise video elementary streams defined in H.264, and the video manager includes information of the video objects having described therein a video object type in which a seamless flag and a seamless extension flag are described which show that the video objects are continuously and seamlessly reproduced for each of the video objects.

Abstract: A digital watermark embedding apparatus comprises a digital watermark generating unit which transforms embedding target contents by using a filter having a coefficient with a periodic number sequence to generate a digital watermark, and an embedding unit which superposes the digital watermark on the embedding target contents to generate watermark embedded contents.

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 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: In an optical disk, a number of video object units arranged consecutively are recorded. The video object unit contains a navigation pack and video packs following the navigation pack, the navigation pack having address information and a picture category relating to a reference picture, the picture category being determined in compliance with the importance level in respect to the reference picture. A sequence of the packets constitutes a stream of nal units classified into a first group of the nal units contributing to produce the reference picture and a second group of the nil unit not contributing to produce the reference picture. In a nal header of the nal unit, reference item information is described that the nal unit belongs to the first group and contributes to produce the reference picture and a type of the payload, the reference item information indicates the priority of the nal unit.

Abstract: A moving picture coding apparatus includes a storing unit that stores an occupancy of a coded picture storing area in which a renderer temporarily stores coded moving picture information received at rendering of the coded moving picture information at a frame rate; a modifying unit that modifies the occupancy based on an amount of the coded moving picture information, and an amount of image data of the coded moving picture information; a deriving unit that derives a condition for the amount of the image data to allow modification at next rendering for each image unit based on a modified occupancy; a setting unit that sets an optimal coding condition of the moving picture information to be coded that satisfies the condition for the amount of the image data; and a coding unit that codes the moving picture information according to the optimal coding condition.

Abstract: A specific frequency extraction unit extracts a specific frequency component signal from an input image signal, a phase controller and amplitude controller control at least one of the phase and amplitude of the specific frequency component signal in accordance with watermark information, and a watermark information superposition unit superposes the specific frequency component signal on the input image signal to generate an image signal embedded with the watermark information.

Abstract: A recording apparatus includes a generation section configured to embed a new watermark in an original content containing an original watermark to generate a new content, and a recording section configured to record the new content.

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.

Abstract: A recording apparatus includes a generation section configured to embed a new watermark in an original content containing an original watermark to generate a new content, and a recording section configured to record the new content.

Abstract: A recording apparatus includes a generation section configured to embed a new watermark in an original content containing an original watermark to generate a new content, and a recording section configured to record the new content.

Abstract: A computer system with a monitor display, comprises a decoder unit configured to decode video data containing digital watermark information to derive decoded data, and configured to determine, based on information included in the video data, whether or not first certification for certifying that the video data is legitimately reproduced data succeeds, and a graphics controller which determines, using the digital watermark information, whether or not second certification for certifying that the video data is to be protected from being copied succeeds, the graphics controller converting the decoded data into a protected decoded data from being copied and outputting the protected decoded data to the monitor display if the first certification and the second certification succeed, and the graphics controller inhibiting the decoded data from being output to the monitor display if the first certification fails and the second certification succeeds.

Abstract: A specific frequency extraction unit extracts a specific frequency component signal from an input image signal, a phase controller and amplitude controller control at least one of the phase and amplitude of the specific frequency component signal in accordance with watermark information, and a watermark information superposition unit superposes the specific frequency component signal on the input image signal to generate an image signal embedded with the watermark information.

Abstract: A specific frequency component extraction unit extracts a specific frequency component signal from an input image signal. A phase controller controls the phase of the specific frequency component signal. A correlator computes the cross-correlation value of the phase-controlled specific frequency component signal and the input image signal. A watermark information estimation unit filters the cross-correlation value to detect watermark information embedded in the input image signal.

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.