Victor Company of Japan, Limited

U.S. Philips Corporation

Jvc Kenwood Corporation

Seiji Higurashi

Takayuki Sugahara

Takeo Ohishi

Toshio Kuroiwa

Mitsuo Harumatsu

Wataru Inoha

Kenjiro Ueda

Kazuo Koda

Yoichi Zenno

Tetsuya Suwa

Yasuhiko Teranishi

Masayoshi Nishitani

Takuya Tsushima

Jin Ogasawara

Yasuaki Yamada

Yumi Yoshida

Norihiko Fuchigami

Takashi Kuriyama

Akira Hirota

Terumi Ohara

Namio Yamaguchi

Kaoru Kobayashi

Tomoyuki Shindo

Hiroshi Nishiumi

Hidemi Nakano

Yoiti Zenno

Tomoyuki Shindou

Ohishi Takeo

Atsushi Miyashita

Executes a re-encoding after decoding data of a connection section A of a first MPEG picture data. This re-encoding is executed based on a control such that a transition of a VBV buffer occupation value starts from a VBV buffer occupation value at a position a and ends with a VBV buffer occupation value at a position d. Up to the position a of the first MPEG picture data, the first MPEG picture data is reproduced. Next, re-encoded MPEG picture data of the connection section A is reproduced. Thereafter, the data is connected to the position d of a second MPEG picture data, and the second MPEG picture data of the position d and after is reproduced.

MPEG picture data recording apparatus, MPEG picture data recording method, MPEG picture data recording medium, MPEG picture data generating apparatus, MPEG picture data reproducing apparatus, and MPEG picture data reproducing method

Video data is divided into portions which are sequentially recorded on recording mediums respectively. IDs of the respective recording mediums are set. IDs of the respective video data portions are set. Items are recoded on first one among the recording mediums. These items are the ID of the first recording medium, the ID of first one among the video data portions, the ID of second one among the recording mediums which follows the first recording medium, and the ID of second one among the video data portions. Items are recorded on last one among the recording mediums. These items are the ID of the last recording medium, the ID of last one among the video data portions, the ID of second last one among the recording mediums which precedes the last recording medium, and the ID of second last one among the video data portions.

Video data recording apparatus and method, and video data reproducing apparatus and method

An output control (OPC) information is recorded on the magnetic tapein conjunction with an MPEG stream. The OPC information is composed of two bits and is extracted from a reproduced signal by the output control circuitand controls the digital interface (D. I/F)and the switch circuit. In case a first bit of the OPC information is '0', the output control circuitmakes the D. I/Fenabled and permits the output of a digital signal. In a case of '1', the output control circuitprohibits to output the digital signal. Further, when the second bit of the OPC information is &#x201c;0&#x201d;, the output control circuitturns the switch circuitoff, preventing the output of an analog component signal. In case its &#x201c;1&#x201d;, the output control circuitpermits the output of the analog component signal.

Method and apparatus for transmitting information, and reproducing apparatus, receiving apparatus and recording medium for the information, and transmission data thereof

At the time of recording, only an edition point is recorded (step S). At the time of reproduction, overlap time (A_overlap) between an audio frame to be reproduced last and an audio frame to be reproduced first, each including a video connection point is calculated and, further, offset time is calculated on the basis of the overlap time (step S). Reproducing audio data by using the calculated offset time (step S) enables reproduction be performed without a gap between audio frames around a connection point. Around connection points, by performing a window function multiplying process on audio data, audio samples are seamlessly connected to each other.

Audio/video recording apparatus, recording method, playback apparatus, playback method, playback program, and recording program

A receiver sends a first random number to a transmitter. The transmitter generates a sync signal in response to the first random number sent from the receiver. The transmitter embeds the sync signal and key information in a second random number to generate a composite signal. In the composite signal, the sync signal is a position indicator for the key information. The transmitter sends the composite signal to the receiver. The transmitter generates an encryption key from the key information. The receiver detects the sync signal in the composite signal sent from the transmitter. The receiver extracts the key information from the composite signal in response to the detected sync signal. The receiver generates an encryption key from the extracted key information. The encryption key generated by the receiver is equal to that generated by the transmitter. Thus, the transmitter and the receiver hold the same encryption key in common.

Information transmission system, and information sending apparatus and information receiving apparatus used therein

In an apparatus for encrypting an information signal into an encryption-resultant signal, a first encryption key peculiar to the present apparatus is generated. Key information is read out from a replaceable recording medium. A decision is made as to whether or not the read-out key information has been generated by an apparatus different from the present apparatus. A second encryption key is generated in response to the read-out key information when it is decided that the read-out key information has been generated by an apparatus different from the present apparatus. One is selected from the first encryption key and the second encryption key as a final encryption key. An information signal is encrypted in response to the final encryption key.

Information-signal encrypting apparatus and information-signal decrypting apparatus

Pictures are captured, and thereby moving-picture data is generated which represents a sequence of moving-picture fields. At least one picture is captured, and thereby still-picture data is generated which represents at least one still-picture frame corresponding in picture capture timing to one of the moving-picture fields represented by the moving-picture data. Components which correspond to said one of the moving-picture fields are removed from the still-picture data to generate supplementary still-picture information. Link information is generated which represents the picture capture timing correspondence between the still-picture frame and said one of the moving-picture fields. The moving-picture data, the supplementary still-picture information, and the link information are recorded on a recording medium.

Information recording apparatus, information reproducing apparatus, and related computer programs

Pictures are successively captured, and thereby moving-picture data representing a stream of moving pictures is generated. At least one picture is captured, and thereby still-picture data representing at least one still picture is generated. The still picture corresponds in picture capture timing to first one of the moving pictures. Link information is generated which represents the correspondence in picture capture timing between the still picture and the first one of the moving pictures. Offset information is generated. The offset information designates a second one of the moving pictures which precedes the first one of the moving pictures by a prescribed time interval. Correspondence information is generated which includes a pair of the link information and the offset information. The moving-picture data, the still-picture data, and the correspondence information are recorded on a recording medium.

Address information is recorded on an optical recording medium having groove portions and land portions. The groove portions form a recording track and are spaced at a constant track pitch. The land portions extend between the groove portions. The address information represents the positions of places on the optical recording medium. The recording of the address information is implemented as follows. The address information is converted into words of a self-synchronizable code. The words of the self-synchronizable code are subjected to bi-phase modulation to generate a bi-phase-modulation-result signal. The bi-phase modulation causes frequency modulation. Thus, the bi-phase-modulation-result signal is a frequency-modulation-result signal. The frequency-modulation-result signal is recorded on at least one sides of the groove portions to form wobble of the recording track.

Address-information recording method and apparatus, and optical recording medium

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Tokyo, Japan

Seiji Higurashi