Video data recording/reproducing system, audio/video data recording/reproducing device, its system, and data reproducing device

An audio and/or video data recording and reproducing system having

• a plurality of audio and/or video data recording and reproducing apparatuses;
• each of the audio and/or video data recording and reproducing apparatuses having
• a recording and reproducing means for recording and reproducing the audio and/or video data,
• a first input/output controlling means for receiving a control input signal from the external unit and inputting and outputting audio and/or video data of a first data rate with the recording and reproducing means in accordance with the received control input signal,
• a second input/output controlling means for receiving a control input signal and inputting and outputting audio and/or video data of a second data rate higher than the first data rate with the recording and reproducing means in accordance with the received control input signal, and
• a recording and reproduction controlling means for transmitting and receiving a predetermined control signal to and from at least the first input/output controlling means and the second input/output controlling means and controlling the first input/output controlling means and the second input/output controlling means;
• the recording and reproduction controlling means having
• a recording region assigning means for receiving a notification of a recording request signal requesting the recording of the input audio and/or video data input from the external unit to the recording and reproducing means from the first input/output controlling means and the second input/output controlling means and assigning recording regions of the recording and reproducing means in which the input audio and/or video data is to be recorded and
• a recording region notifying means for notifying the first input/output controlling means and the second input/output controlling means of the recording region notification signal indicating the recording regions of the recording and reproducing means assigned to the input audio and/or video data;
• and
• each of the first input/output controlling means and the second input/output controlling means having
• a recording request notifying means for notifying the recording and reproduction controlling means of the recording request signal from the external unit and
• a recording controlling means for receiving the recording region notification signal and controlling the recording and reproducing means and making the same record the input audio and/or video data in the recording regions of the recording and reproducing means indicated by the received recording region notification signal;
• and
• the second input/output controlling means of the plurality of audio and/or video data recording and reproducing apparatuses are connected, and the audio and/or video data of the second data rate is transmitted and received between these audio and/or video data recording and reproducing apparatuses.

A data reproducing apparatus having a rotary drum, n (n>2) number of data reading head means disposed on an outer peripheral surface of the rotary drum and a data reproducing means for reproducing recorded data alternately recorded on helical tracks of the tape recording medium at a first azimuth angle and a second azimuth angle by using identification data recorded on the helical tracks and indicating an order of the recorded data, in which

• the rotary drum rotates at a constant rotational speed to make the n number of data readings
• each of the n number of data reading head means has
• two first reproducing heads which scan the helical tracks given the first azimuth angle and a helical track separated by one track distance and read the recorded data and the identification data and
• two second reproducing heads which scan the helical tracks given the first azimuth angle and a helical track separated by one track distance and read the recorded data and the identification data;
• the data reproducing means has
• an error detecting means for detecting the error of each of the identification data and the recorded data read by the n number of data reading head means,
• a data selecting means for selecting each recorded data having the smallest error from among the recorded data read by each of the n number of data reading head means, and
• a data arranging means for arranging the recorded data selected based on the identification data corresponding to each of the selected recorded data in the order of the time of the recording and outputting the same.