Abstract: A data editing apparatus includes a mass storage device to edit multimedia data such as picture, audio, text and other data. By the visual graphic display of the time positions of the edited information, the user can easily grasp the reproduction time of the picture, text and audio data, thereby simplifying synchronization of plural media data. Graphic editing may be effected to facilitate multimedia data editing.

Abstract: A data editing apparatus includes a mass storage device to edit multimedia data such as picture, audio, text and other data. By the visual graphic display of the time positions of the edited information, the user can easily grasp the reproduction time of the picture, text and audio data, thereby simplifying synchronization of plural media data. Graphic editing may be effected to facilitate multimedia data editing.

Abstract: Information which must be continuously inputted or outputted in time, namely, audio and picture information, are inputted and outputted into a file apparatus as the digital data. Conventionally, the continuous inputting and outputting operations of the audio and the picture information and editing operations such as deletion, insertion and so on could not be made compatible and instantaneous. In the present technique an individual size is continuously stored into a storage media physically, and the input and output of the data and the storage reproduction with the storage media are effected in non-synchronization, with the size of an input/output buffer, a unit of an input/output of the audio and the picture information, and the unit of the editing being the same in size so as to realize instantaneousness and continuous input/output operations of the editing.

Abstract: Mass data is managed as data files in a mass data storage device. Each data file is formed or plural data blocks. Upon editing of a data file, the data content of each data block forming the file is examined. If the data content of a data block is less than a predetermined value, data from one or more adjacent data blocks is extracted and placed in the one data block so that the data content thereof will be at least the predetermined constant value. In this manner, the data content of blocks forming a file is maintained at or above a predetermined level.