Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Mutsuyuki Okayama

Akihiro Takeuchi

Masaaki Kobayashi

Masazumi Yamada

Kenji Morimoto

Yasuo Hamamoto

Atsuo Ochi

Tadashi Kunihira

Hirofumi Nakagaki

Akira Iketani

Yoshihiro Morioka

Kohei Suzuki

Haruo Ohta

Etsuto Nakatsu

Masaki Ito

Katsufumi Kohno

A method for converting a data stream in a first format into a data stream in a second format is provided. Each stream includes data packs in which video/audio data are stored and a control pack for use in a playback control of the stream. In the first format stream, address information, representing addresses of the data packs and not required while the stream is played back, is present and associated with the stream. In the second format stream, address information, representing addresses of the data packs and required while the stream is played back, is stored in the control pack. The method includes the steps of: acquiring the first format stream and its associated address information; generating a second control pack in the second format from a first control pack in the first format, the second control pack storing the address information acquired; and replacing the first control pack with the second control pack, thereby generating the second format stream from the first format stream.

Data stream format conversion method and recording method for the same

A reproducing method for reproducing data from tracks recording signals interleaves over plural tracks, storing the reproduced data, processing the stored data by error correction, issuing an error correction disable signal in the case of data processing impossible to correct in this error correction process, and controlling so as not to issue data in the track having interleaving relation with the data delivering this error correction disable signal, and a reproducing apparatus and a recording and reproducing apparatus using this method, and only by adding the function for controlling the data to be issued on the basis of the result of detection of error correction disable, stable reproduction free from reproduction of largely objectionable image due to error can be realized.

Reproducing method, reproducing apparatus and recording and reproducing

A recording apparatus for recording digital signals to plural tracks formed sequentially on a tape using plural heads includes a first selector for selecting the first through n track sets, continuous tracks within the plural tracks formed on the tape. A disposer disposes the first through k separated high speed reproduction data areas to the same positions in each of the m tracks comprising the first through n track sets. A first recording unit records the same high speed reproduction data to the same track position in at least the tracks having the same azimuth within the m*k high speed reproduction data areas belonging to the same track set. A second selector selects the n+1 through n+N, each track set comprising M tracks selected from among the tracks to which the high speed reproduction data areas are not disposed. A second disposer disposes a continuous very-high speed reproduction data area to the same position in each of the M tracks forming the n+1 through n+N track sets. A second recorder record the same very-high speed reproduction data to the M very-high speed reproduction data areas belonging to the same track set within the M*N very-high speed reproduction data areas belonging to the n+1 to n+N track sets.

Recording and reproducing apparatus

A recording and reproducing apparatus for an input encoded data stream having two different bit rates N.sub.1 and N.sub.2, where N.sub.1 &lt;N.sub.2. The recording and reproducing apparatus includes: an input interface for outputting the input encoded data stream to two channels; recording processors, connected to the outputs of the input interface, for converting the input encoded data stream into a signal suitable for writing onto a magnetic tape by a recording head; a tape speed controller for varying the speed of the magnetic tape in accordance with the bit rates of the input encoded data stream; a reproducing head for reading the signal from the magnetic tape; reproducing processors for processing a reproduced signal; and an output interface. The input interface divides and outputs the input encoded data stream to both of the two channels when the bit rate of the input encoded data stream is N.sub.2, while the input interface outputs the input encoded data stream to only one of the two channels when the bit rate of the input encoded data stream is N.sub.1. The output interface integrates and outputs the input signals from the two channels when the bit rate of the reproduced encoded data stream is N.sub.2, while the output interface outputs the input signal from only one of the two channels when the bit rate of the reproduced encoded data stream is N.sub.1.

Encoded data stream recording and reproducing apparatus with tape speed,

In a video tape recorder of the color under recording type, in which a low frequency band converted carrier chrominance signal is recorded together with an FM luminance signal, another FM modulator is provided for modulating a wide band chrominance signal. An additional head records the FM chrominance signal on at least a part of a track on which video signal has been recorded in the color under recording. In reproduction, it is checked whether the FM chrominance signal is reproduced or not for selecting the FM chrominance signal or the color under recorded carrier chrominance signal as a reproduced chrominance signal output.

Video tape recorder capable of recording and reproducing wide-band

A decoder for product codes includes a received symbol reliability detector for detecting the reliability of each erase-flag-carrying symbol produced by a row code decoder, and an erase flag adjuster for eliminating the erase flag of a particular symbol which has a higher reliability than a predetermined reference value among erase-flag-carrying symbols supplied from a row code decoder in accordance with a data output of a received symbol reliability detector.

Digital signal decoder

An apparatus for converting a wide screen television signal to a desired normal screen television signal includes an extraction circuit for selectively extracting a portion of the wide screen television signal corresponding to a normal screen television picture to obtain the desired normal television signal, a motion detector for detecting a motion of a picture produced by the wide screen television signal, and a control circuit for controlling the extracting circuit to extract the portion of the wide screen television signal according to a motion detection result of the motion detector. A plurality of candidate areas to be extracted from the wide screen television picture are predetermined. The motion detector detects from among the plurality areas an area in which the motion of the picture is the largest. The control circuit controls the extracting circuit to extract a portion of the wide screen television signal corresponding to the area in which the motion of the picture is the largest.

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Kobe, Japan

Mutsuyuki Okayama