Mitsubishi Electric Corporation

Koutarou Asai

Tokumichi Murakami

Shunichi Sekiguchi

Yoshihisa Yamada

Kazuo Sugimoto

Yoshimi Moriya

Yuichi Idehara

Koichi Magai

Mitsuyoshi Suzuki

Ryousuke Fujii

Hiroshi Itou

Yoshiaki Katou

An image encoder including: a predicted-image generating unit that generates a predicted image in accordance with a plurality of prediction modes indicating predicted-image generating methods; a prediction-mode judging unit that evaluates prediction efficiency of a predicted image outputted from the predicted-image generating unit to judge a predetermined prediction mode; and an encoding unit that subjects an output of the prediction-mode judging unit to variable-length encoding. The prediction-mode judging unit judges, on the basis of a predetermined control signal, which one of a common prediction mode and a separate prediction mode is used for respective color components forming the input image signal, and multiplexes information on the control signal on a bit stream, multiplexes, when the common prediction mode is used, common prediction mode information on the bit stream, and multiplexes, when the common prediction mode is not used, prediction mode information for each of the color components on the bit stream.

Image encoder and image decoder, image encoding method and image decoding method, image encoding program and image decoding program, and computer readable recording medium recording with image encoding program and computer readable recording medium recorded with image decoding program

Image encoder and image decoder, image encoding method and image decoding method, image encoding program and image decoding program, and computer readable recording medium recorded with image encoding program and computer readable recording medium recorded with image decoding program

The digital watermark embedding apparatus includes: a storing unit () for storing in advance at least one embedding function, at least one image converting program, and at least one image processing program that are required for a digital watermark embedding process, and storing in advance combination process information in which a process ID is assigned to each combination of those processing functions; an embedding process selecting unit () for selecting, as particular combination process information, one of a plurality of pieces of the combination process information; and an embedding unit () for obtaining from the storing unit () the embedding function, the image converting program, and the image processing program which are included in the selected particular combination process information, embedding particular embedding information into multimedia data, and generating determination information including the process ID corresponding to the particular combination process information.

Digital watermark embedding apparatus, digital watermark detecting apparatus, and digital watermark system

Even when erroneous encoded data is inputted to a decoding device, the decoding device is recovered during one video frame period including a video frame time of the inputted data to enable decoding processing on a next video frame. The decoding device includes: a receiving section () for receiving encoded data () to output the encoded data corresponding to a video frame, outputting encoded data of a next frame in response to a decoding completion signal () to be received, and for transmitting an error signal () when the decoding completion signal is not received during a predetermined time; an image decoder () for decoding the encoded data () from the receiving section (), transmitting the decoding completion signal () to the receiving section () when decoding is completed, and for stopping decoding processing in response to a reset signal () to be received; and an error recovery section () for outputting the reset signal () to the image decoder () when the error signal () is received.

Decoding device

Growing community of inventors

Chiyoda-ku, Japan

Koutarou Asai