Abstract: A tape transport speed control uses a synthesized clock signal primarily derived from playback data signals in a preselected primary data track. Data signal drop-out in the primary data track used to produce the synthesized clock signal is monitored by a digital logic circuitry which is effective to borrow secondary derived clock signals from an adjacent data track on the same tape. The borrowed secondary synthesized clock signals are used during the drop-out interval on the primary data. The handover of the borrowed clock signals from the adjacent track and the return to the clock signals derived from the primary track is performed automatically by a sensing of the start and end of the drop-out.

Abstract: A system is disclosed for arranging digital data provided in a plurality of individual information channels. The digital data provided in each channel includes a continuous serial stream of digital data bits having synchronizing signals periodically included therein. All of the channels include a like number of data bits between successive synchronizing signals. Also the data in each of the individual information channels may be skewed in time with respect to corresponding portions of the data in the other information channels. A plurality of processors are provided with each being associated with a corresponding channel and each including a storage device together with means for sensing the occurrence of a synchronizing signal in the corresponding channel together with apparatus for storing data bits in selected positions in the storage means in accordance with the position that the data bits have in the serial stream with respect to the synchronizing signals.

Abstract: A system is disclosed wherein a series bit stream of digital data, at a relatively high bit rate, is received and the data is recorded on a multiple channel recording medium. During the recording of the data, the data is divided into frames of words each having N bits. Each word has a parity bit added so that each word has N+1 bits. In addition, the data for each channel is recorded in frames where each frame includes a synchronization word followed by fixed plurality of data words. Since each recorded frame includes more bits than the originally received data bits per frame, the recording bit rate for each channel is substantially higher than the incoming data bit rate per channel. All frames from the various channels are recorded simultaneously so that the synchronization words from channel to channel are in alignment. During the read-out process, all of the channels are simultaneously read so as to provide a plurality of reconstructed data channels, each including a serial stream of data bits.

Abstract: A system is disclosed wherein a series bit stream of digital data, at a relatively high bit rate, is received and the data is recorded on a multiple channel recording medium. During the recording of the data, the data is divided into frames of words each having N bits. Each word has a parity bit added so that each word has N+1 bits. In addition, the data for each channel is recorded in frames where each frame includes a synchronization word followed by fixed plurality of data words. Since each recorded frame includes more bits than the originally received data bits per frame, the recording bit rate for each channel is substantially higher than the incoming data bit rate per channel. All frames from the various channels are recorded simultaneously so that the synchronization words from channel to channel are in alignment. During the read-out process, all of the channels are simultaneously read so as to provide a plurality of reconstructed data channels, each including a serial stream of data bits.