Kddi Corporation

Kddi R&d Laboratories, Inc.

Koichi Takagi

Shigeyuki Sakazawa

Yasuhiro Takishima

Masaru Sugano

Masahiro Wada

Sei Naitou

Hiroshi Mitsuhashi

Ryouichi Kawada

Koji Katayama

Yousuke Toyota

Shuuichi Matsumoto

Jianfeng Xu

Gouichi Ishihara

A video content generation device generates video data synchronized with music data based on motion data, representing a motion graph including nodes, edges, and weights, and metadata indicating a synchronization probability per each node between the motion graph and a musical tune. A music data storage unit stores the predetermined amount of music data and their musical characteristics in connection with the predetermined number of beats, in a reproduction order, retrieved from the musical tune. An optimum path search unit searches an optimum path connecting between nodes, each of which is selected per each beat with a high synchronization probability, on the motion graph with motion characteristics matching with musical characteristics based on the predetermined amount of music data. Video data synchronized with music data is generated based on synchronization information for correlating motion data to music data along with the optimum path.

Video content generation system, video content generation device, and storage media

The present invention provides a digital data reproducing device having a simple configuration and being capable of protecting copyright of digital data such as video or audio. Content provider side embeds copyright management information (cumulative number of reproduction times, permissible number of reproduction times, etc.) into digital data that has been degraded by scrambling, and provides it to a content user. A reproducing device of the content user side causes copyright management information detection unit to detect the copyright management information, decreases the data degradation depending on result of the detection, and reproduces by data reproducing unit.

Digital data reproducing device

Techniques of allowing a communication terminal to edit original content stored in a content server are disclosed. According to the techniques, the original content is converted into decimated and downsized proxy content; the proxy content is transmitted from the content server to the communication terminal; the proxy content is displayed on a display screen of the communication terminal; in response to a user's editing operation on the communication terminal, proxy-editing information is produced by the communication terminal; the proxy-editing information is transmitted from the communication terminal to the content server; and the content server edits the original content in accordance with the proxy-editing information.

Method and system for editing content in server

The present invention provides a scrambled compressed data distribution device that can perform a high-resistance scrambled compressed data distribution by selectively using a plurality of types of scramble information and a playback device thereof. A scrambling section scrambles compressed data by unique one of a plurality of scrambling methods. A hash value calculating section determines a hash value based on data b in a position where digital watermark data is not embedded, and an encrypting section encrypts the hash value with a secret key Sk(n) corresponding to the scrambling method and outputs an encrypted hash value c. A watermark data embedding section embeds the encrypted hash value in a watermark data embedding position of the data b and transmits the same as a compressed data stream d.

Compressed data scrambled distribution device and playback device thereof

Degraded digital data is distributed from a serverto each user A, B, C, and D. An encrypted degradation compensation module is also delivered to the digital data duplicating apparatusfor the user A. The digital data duplicating apparatusdecrypts the encrypted degradation compensation module using its own encryption key, when playing digital data, to generate a 100% degradation compensation module. This module is applied to the degraded digital data to compensate the degradation thereof. An encrypted degradation compensation module of which the degradation compensation capability is reduced is delivered from the user A to the user B. The user B can use the encrypted degradation compensation module of which the degradation compensation capability is reduced from the user A to replicate the degraded digital data.

Method and apparatus for digital data accompanied by degradation

There is provided a system capable of distributing code-compressed data based on audio data on a music composition via the Internet to a mobile telephone so that a user can cut out a desired range from the code-compressed data and register it as a call sound. The system has a data structure of a content frame (3GPP, 3GPP2) containing code-compressed data (AAC) of audio data. The content frame has at least one cut-out position information in the AAC data in its extended function section. A mobile telephone has a content storage unit, a cut-out selection unit to be used by the user to select at least one cut-out position information contained in the extended function section of the content frame, and a data cut-out section for cutting out data from the code-compressed data. The code-compressed data which has been cut out is decompressed when called and the sound is outputted from a loudspeaker.

Content distribution server for distributing content frame for reproducing music and terminal

An apparatus that process framed audio data to add fade-in and/or fade-out effect with low computing speed and small memory. The apparatus includes a deframer for taking an original value of a first gain parameter from an input audio frame, a first gain parameter adjuster for adjusting the first gain parameter based on the original value for a preset duration, and a framer for generating an output audio frame, which has the adjusted value for the first gain parameter.

Apparatus for processing framed audio data for fade-in/fade-out effects

The present invention provides a quantization control system for video coding, for optimizing bit allocation based on visual priority which expresses at high precision human visual characteristics for videos, thereby improving subjective image quality of the whole image even with a limited number of bits. An object is extracted from a picture of an input image (S) and a gaze parameter V(j) for the extracted object is calculated (S). Then, a texture attribute parameter t(k) of each macroblock included in the object is calculated (S). The gaze parameter V(j) and texture attribute parameter t(k) are used to calculate a visual priority parameter w(k) for each macroblock. Based on this parameter w(k), a quantization parameter is determined.

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Saitama, Japan

Koichi Takagi