Abstract: A digital video tape recorder records a teletext signal together with a digital video signal on a magnetic tape. The teletext signal is extracted from a broadcast video signal and recorded in the form of binary data in auxiliary data areas of a video signal recording region in each recording track on the magnetic tape.

Abstract: A video tape recording and reproducing apparatus records and reproduces digital video signals representing both still pictures, and moving pictures in the form of coded signals that have a recording format which includes a video signal recording area for recording video data and its respective accompanying video information, and a subcode information area. The recording and reproducing apparatus generates signals for high speed cuing and reproduction of the still pictures and moving pictures and stores the signals in the accompanying video information and in the subcode area.

Abstract: Apparatus for processing first and second digital signals with the same processing device, the two digital signals having respective first and second data configurations which differ from each other, and wherein the first data configuration contains a greater amount of data than the second data configuration. Known, predetermined data is added to the second digital signal, thereby converting the second data configuration to the first data configuration. An error processor, such as an error detection/correction generator or an error corrector, is adapted to process the first digital signal as is and is selectively changed over to receive the converted second digital signal, so as to carry out the same error processing operation on either one of the digital signals.

Abstract: A method of dubbing compressed digital video signals adopted for an apparatus for efficient coding and subsequent recording/playback of video signals. In the method of dubbing compressed digital video signals, on a playback unit side, after padding error data by an error processing circuit with respect to an error uncorrectable in error correction by an ECC circuit of playback, the digital video signal is provided with a parity for transmission by a parity generating circuit and is then transmitted to a recording unit side. On the other hand, on the recording unit side, after padding error data by an error processing circuit with respect to an error uncorrectable in error correction by an ECC circuit of transmission, the digital video signal is provided with a parity for recording by a parity generator and is then recorded in a recording medium.

Abstract: A digital signal source and an analog signal source, such as might be contained in a video tape cassette, can be discriminated from each other in a video tape recorder by providing only a minimum of electrical contacts. A first contact is connected to a voltage source and a fourth contact is connected to ground, while second and third contacts are connected through resistors to the voltage source. The second and third contacts are respectively connected through fixed contacts of two change-over switches to a serial data line and to a serial clock line of a data processing circuit, and those contacts are also respectively connected through the other fixed contacts of the change-over switches to comparing input terminals of a group of comparators.

Abstract: Digital signal processing apparatus in which compressed frequency components of a digital signal are processed to selectively achieve fade-in, fade-out and scene change effects and where the digital signal is scrambled (and subsequently descrambled) in whole or in by part scrambling (or descrambling) selected compressed frequency components of the digital signal.

Abstract: Apparatus and methods are provided for variable length encoding and transmitting a plurality of predetermined portions of digital image signals which has been encoded to compress image data therein. Each of the plurality of predetermined portions is variable length encoded to form a corresponding one of a plurality of variable length encoded portions. The amount of data in each of the portions is limited so that an amount of data contained in the corresponding variable length encoded portion is equal to or less than a predetermined target value. The variable length encoded portions are arranged in a plurality of sync blocks having a predetermined data length such that each portion is contained entirely within a respective number of sync blocks and the sync blocks are transmitted via a transmission medium.

Abstract: A recording and/or reproducing apparatus selectively performs video recording and audio recording on a common magnetic tape. In an audio recording mode, the video recording area used to record video signals in a video recording mode is divided into a plurality of segments serving as audio recording channels. The recording and/or reproducing apparatus is provided with a recorded channel detector and an indicator including a plurality of indicator segments, each of which corresponds to one audio recording channel. The detector produces a detector signal representing that the current channel is pre-recorded. The indicator segments are responsive to the detector signals from the recorded channel detector to turn ON to indicate that the corresponding audio recording channel is occupied. This arrangement facilitates channel selection for the audio recorder by simply monitoring the indicator.

Abstract: In a PCM (pulse code modulated) audio signal recording and/or reproducing apparatus, a scanning track formed by one scanning of a tape by a rotary head is divided into a plurality of track areas in its longitudinal direction to thereby form multi-channel segment track areas, and the PCM audio signal is recorded on and/or reproduced from the segment track area of each track corresponding to a particular channel on the tape. When a plurality of programs or events are sequentially recorded in a timer scheduled recording mode, it is possible to select either a series recording mode in which successive events are recorded only in the segment track areas of one channel or a parallel recording mode, in which the successive events are recorded in segment track areas of different channels, respectively.