Method and system for recording standard pulse code modulated se

Details Method and system for recording standard pulse code modulated se Method and system for recording standard pulse code modulated se

1987-10-08

1990-07-24

McElheny, Jr., Donald

Facsimile and static presentation processing

Facsimile

Recording apparatus

360 91, 360 32, 360 64, H04N 5782

Patent

active

049438654

ABSTRACT:
A method and system of recording on a video signal recorder a serialized stream of pulse code modulated digital data bits. The video signal recorder has multiple record/playback heads and is of the type normally adapted to record video signals such as television signals under the control of synchronizing signals included in the video signals. Data frames having a predetermined number of data bits of the serialized stream of pulse code modulated digital data bits are successively applied at a given frequency to a data buffer. The frequency of the data bits of the data frames output from the data buffer is increased thereby compressing in time the data frames. Buffer zones of filler bits provide a predetermined period of time between successive data frames. Synchronizing signals are inserted in the buffer zones for controlling the timing of switching events between recording heads to occur within the predetermined period of time. Frame synchronizing signal codes are also inserted in the buffer zones for locating the data frames during playback. The composite signal including successive buffer zones, with the inserted synchronizing signals and frame synchronizing signal codes, and the compressed data frames are applied to a video signal recorder for recording. Upon play back, the recorded compressed data frames are reconstructed to their original frequency and format as received for recording.

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