Digital video signal recording and reproducing method and apparatus thereof

A digital video recording and reproducing method comprising the steps of:

• helically scanning a first region of a magnetic tape running at a normal speed;
• recording a digital data train of a plurality of frames per second on a plurality of sloped tracks, and simultaneously picking up the digital data from at least one frame among said plurality of frames;
• recording said at least one frame of a digital data train formed of the picked-up digital data on at least one horizontal track in a second region of the magnetic tape through at least one fixed head, the second region being different from the first region;
• and
• reproducing the data recorded on the first region during a normal reproduction, while the magnetic tape runs at a predetermined multiple speed during a variable speed reproduction, to reproduce the data recorded on the second region.

A digital video recording and reproducing apparatus comprising:

• a plurality of rotary heads for helically scanning a first region of a magnetic tape at a predetermined rotation speed;
• a plurality of fixed heads for lengthwise scanning a second region of the magnetic tape which is different from the first region;
• a normal recording portion which receives a digital audio/video signal, performs high efficiency encoding, error correction encoding and a channel encoding of the received signal, and supplies the encoded signal to the plurality of rotary heads;
• a variable speed recording portion which receives as an input signal every Nth frame of the digital video signal input to the normal recording portion, performs sub-sampling, high-efficiency encoding and channel division of the input signal, performs error correction encoding and channel encoding of the respective divided channel signals and supplies the thus-processed signal to the corresponding fixed heads;
• a normal reproduction portion which processes the signals picked-up from the first region of the magnetic tape via the plurality of rotary heads in a reverse manner as that of the normal recording portion and restores the processed signals into original normal reproduction signals, during the normal reproduction;
• and
• a variable speed reproduction portion which processes the signals picked-up from the second region of the magnetic tape via the plurality of the fixed heads in a reverse manner as that of the variable speed recording portion and restores the processed signals into original signals corresponding to the input signal, during the variable speed reproduction.