Editing system and editing method

An editing system comprising:

• a data recording/reproducing device for recording/reproducing a plurality of channels of source video data;
• the data recording/reproducing device including:
• recording/reproducing means for recording one frame of pixel data of the plurality of channels of source video data onto a plurality of randomly accessible recording media and reproducing desired source video data from the plurality of recording media, and
• control means for controlling the recording/reproducing means by using a first algorithm for dividing the one frame of pixel data into a plurality of subblocks and dispersing the data of the subblocks to a plurality of different recording media, a second algorithm for, in access to a subblock of several frames with respect to each recording medium, scheduling an access order to the subblock of several frames so that a seek distance of a head becomes minimum, and a third algorithm for determining a recording position of each subblock to be recorded on the recording medium so that a rotational delay time of the head becomes minimum in accessing a desired subblock on the recording medium, said control means determining a size of each of said plurality of subblocks in accordance with a radial position on a recording medium designated to be recorded with a corresponding subblock;
• and
• a computer for controlling the data recording/reproducing device;
• the computer including:
• control means for controlling the data recording/reproducing device so as to read out, in real time, a plurality of channels of video streams constituted by desired frames of the plurality of channels of source video data recorded at random positions on the plurality of recording media, from the respective recording media in accordance with operation by an editing operator.

An editing system for editing a plurality of channels of source video data on the basis of editing information inputted by an operator, the editing system comprising:

• recording means for dividing each frame of pixel data of the plurality of channels of source video data into a plurality of subblocks, and recording the plurality of channels of source video data on the basis of a predetermined recording algorithm for recording the respective subblocks so that the subblocks are dispersed onto a plurality of different disks and so that, in each disk, a rotational delay time of a head becomes minimum in accessing a desired subblock, the recording means determining a size of each of said plurality of subblocks in accordance with a radial position on a recording medium designated to be recorded with a corresponding subblock;
• reproducing means for simultaneously reproducing the plurality of channels of video data by accessing the plurality of subblocks recorded by the recording means on the basis of the predetermined recording algorithm used in recording the source video data;
• and
• editing means for editing the plurality of channels of video data reproduced by the reproducing means on the basis of the editing information inputted by input means so as to generate at least one channel of video data.

An editing system for editing a plurality of channels of source video data on the basis of editing information inputted by an operator, the editing system comprising:

• recording means for dividing each frame of pixel data of the plurality of channels of source video data into a plurality of subblocks, and recording the plurality of channels of source video data on the basis of a predetermined recording algorithm for recording the respective subblocks so that the subblocks are dispersed onto a plurality of different disks and so that, in each disk, a rotational delay time of a head becomes minimum in accessing a desired subblock, the recording means determining a size of each of said plurality of subblocks in accordance with a radial position on a recording medium designated to be recorded with a corresponding subblock;
• edited stream generating means for generating an edited stream on the frame basis constituted by desired frames of the plurality of channels of source video data recorded by the recording means;
• and
• reproducing means for outputting a video stream corresponding to the edited stream generated by the edited stream generating means, by accessing the plurality of subblocks recorded by the recording means on the basis of the predetermined recording algorithm used in recording the source video data.

An editing system comprising:

• a data recording/reproducing device for recording/reproducing a plurality of channels of source video data;
• the data recording/reproducing device including:
• recording means for dividing one frame of data of the source video data into a plurality of subblocks and recording every plurality of subblocks onto a plurality of different disks,
• reproducing means for reproducing the plurality of subblock data from the plurality of different disks so as to generate one frame of the source video data from the plurality of reproduced subblock data,
• means for preparing a block map for managing which disk of the plurality of disks is to be used and how a recording area on the disk is to be used in recording the source video data, before starting recording of the source video data, and control means for controlling the recording/reproducing means on the basis of the block map in recording the plurality of subblocks onto the plurality of disks and for determining a size of each of said plurality of subblocks in accordance with a radial position on a recording medium designated to be recorded with a corresponding subblock, and an editing device for editing the source video data recorded in the recording device;
• the editing device including:
• editing means for controlling the data recording device so as to read out, in real time, desired frames of the source video data recorded at random positions on the plurality of recording media, from the plurality of recording media.

An editing system comprising:

• a data recording/reproducing device for recording/reproducing a plurality of channels of source video data;
• the data recording/reproducing device including:
• recording/reproducing means for recording one frame of pixel data of the plurality of channels of source video data onto a plurality of randomly accessible recording media, and reproducing a plurality of channels of video streams constituted by desired frames of the plurality of the channels of video data stored on the plurality of recording media, and
• control means for controlling the recording/reproducing means on the basis of a block map for theoretically managing recording areas on the recording media on the subblock basis so that, in recording a plurality of subblocks generated by dividing the one frame of pixel data onto the respective recording media, each subblock is recorded at a position such that a rotational delay time of a head becomes minimum, the control means determining a size of each of said plurality of subblocks in accordance with a radial position on a recording medium designated to be recorded with a corresponding subblock an editing device for editing the source video data recorded in the recording device;
• the editing device including:
• video data processing means for processing, in real time, the plurality of channels of video streams reproduced from the data recording/reproducing device in accordance with an editing indication from the computer so as to generate edited video data;
• and
• a computer for controlling the editing device and the data recording/reproducing device.

An editing system for editing a plurality of channels of source video data recorded on a plurality of recording media, the editing system comprising:

• a zone bit recording table for storing data indicating correspondences between radial positions on the recording media and the sizes of the subblocks;
• block map generating means for generating a block map for theoretically formatting recording areas on the recording media so that, in accessing a plurality of subblocks divided from one frame of the source video data, each subblock data is recorded at a position such that a rotational delay time of a head becomes minimum;
• recording means for recording the plurality of channels of video data onto the recording media on the subblock basis, on the basis of the block map generated by the block map generating means;
• edit list generating means for generating an edit list on the frame basis constituted by desired frames existing at random positions on the recording media on which the plurality of channels of source video data are recorded;
• and
• reproducing means for reproducing a plurality of subblocks corresponding to a frame designated by the edit list from the plurality of recording media on the basis of the block map so that a video stream corresponding to the edit list is generated.

An editing method for editing a plurality of channels of source video data recorded on a plurality of recording media, the editing method comprising the steps of:

• dividing the one frame of pixel data of the source video data into a plurality of subblocks and transferring the divided subblocks of data to a plurality of different recording media so that the subblocks of data are recorded onto the respective recording media, while recording each subblock data at a position such that a rotational delay time of a head becomes minimum in accessing a desired subblock on the recording medium of each transfer destination;
• determining a size of each of said plurality of subblocks in accordance with a radial position on a recording medium designated to be recorded with a corresponding subblock;
• generating an edit list on the frame basis constituted by desired frames existing at random positions on the recording media on which the plurality of channels of source video data are recorded;
• and
• repeating processing to reproduce a plurality of subblocks corresponding to a frame designated by the edit list and restore the one frame from the plurality of reproduced subblocks, for each frame designated as the edit list, so as to generate an edited video stream corresponding to the edit list.

An editing method for editing a plurality of channels of source video data recorded on a plurality of recording media, the editing method comprising the steps of:

• generating a block map for theoretically formatting recording areas on the recording media so that, in accessing a plurality of subblocks divided from one frame of the source video data, each subblock data is recorded at a position such that a rotational delay time of a head becomes minimum;
• determining a size of each of said plurality of subblocks in accordance with a radial position on a recording medium designated to be recorded with a corresponding subblock;
• recording the plurality of channels of video data onto the recording media on the subblock basis, on the basis of the block map;
• generating an edit list on the frame basis constituted by desired frames existing at random positions on the recording media on which the plurality of channels of source video data are recorded;
• and
• reproducing a plurality of subblocks corresponding to a frame designated by the edit list from the plurality of recording media on the basis of the block map so that a video stream corresponding to the edit list is generated.