US 4,905,100 A · Magnetic recorder/reproducer

Abstract

A magnetic recorder/reproducer converts two-channel analog signals into digital signals by a sample-and-hold/A-D converter circuit (3) and controls addresses in a memory circuit (4) by a memory address control circuit (5), to distribute the digital signals into odd sample groups and even sample groups per each channel for arraying the odd sample groups and the even sample groups of the same channel in alternate scanning intervals, thereby to write the same in the memory circuit so that the odd samples and the even samples of the same channel are arrayed in positions separated from each other along the direction of scanning by rotary heads (10, 11). The digital signals thus permutated are modulated by a modulation circuit (7), to be recorded in a magnetic tape by the rotary heads. The digital signals reproduced by the rotary heads are demodulated by a demodulation circuit (14), to be stored in a memory circuit (15). A memory address control circuit (16) controls addresses so as to permutate samples of the reproduced digital signals stored in the memory circuit to be in the original array thereof. The reproduced digital signals read from the memory circuit are converted into analog signals by a D-A converter (18), to be outputted through a low-pass filter (19).

Claims62

Dependent claims

A magnetic recorder comprising recording means including a plurality of rotary heads (10,11) for performing helical scanning to produce a recording in the form of a plurality of tracks, the recorder further comprising signal processing means (4,5) for providing to the recording means digital signals comprising odd and even samples of at least one channel for enabling interleaved recording of said digital signals in such a way that the odd and even samples of said channel are recorded in different tracks and that sequentially occurring odd and even samples are separated in a direction defined along the length of the tracks,

wherein the signal processing means (4,5) is structured for providing the digital signals of a plurality of channels in such a manner that, for each channel, the odd samples are recorded in a group in a region of one track, and the even samples are recorded in a group in a region of a different track, the region of said different track containing the even samples occupying a portion of the length of said different track which excludes a portion of said different track corresponding in location to a portion of the length of said one track occupied by the region in which the odd samples are recorded.

A magnetic reproducer comprising reproducing means including a plurality of rotary heads (10,11) for performing helical scanning to reproduce a recording in the form of a plurality of tracks, each track having a plurality of regions occupying different portions along the length of the track, the reproducer further comprising signal processing means (15,16) for receiving from the reproducing means digital signals comprising odd and even samples of at least one channel for enabling reproduction of interleaved digital signals recorded in such a way that the odd and even samples of said channel are recorded in different tracks and that sequentially occurring odd and even samples are separated in a direction defined along the length of the tracks,

wherein the signal processing means (15,16) is structured for reproducing the digital signals of a plurality of channels in such a manner that, for each channel, the odd samples are reproduced in a group from a region of one track and the even samples are reproduced in a group from a region of a different track, the region of said different track containing the even samples occupying a portion of the length of said different track which excludes a portion of said different track corresponding in location to a portion of the length of said one track occupied by the region in which the odd samples are recorded.

A recording method for magnetically recording digital signals including odd and even samples of at least one channel by helically scanning a plurality of tracks of a recording medium, each track having a plurality of regions occupying different portions along the length of the track, for enabling interleaved recording of said digital signals in such a way that the odd and even samples of said channel are recorded in different tracks and that sequentially occurring odd and even samples are separated in a direction defined along the length of the tracks, comprising the steps of,

for each channel, recording the odd samples in a group in a region of one track, and recording the even samples in a group in a region of a different track, the region of said different track containing the even samples occupying a portion of the length of said different track which excludes a portion of said different track corresponding in location to a portion of the length of said one track occupied by the region in which the odd samples are recorded.

A reproducing method for magnetically reproducing digital signals including odd and even samples of at least one channel by helically scanning a plurality of tracks of a recording medium, each track having a plurality of regions occupying different portions along the length of the track, for enabling reproduction of said digital signals interleavedly recorded in such a way that the odd and even samples of said channel are recorded in different tracks and that sequentially occurring odd and even samples are separated in a direction defined along the length of the tracks, comprising the steps of,

for each channel, reproducing the odd samples in a group from a region of one track, and reproducing the even samples in a group from a region of a different track, the region of said different track containing the even samples occupying a portion of the length of said different track which excludes a portion of said different track corresponding in location to a portion of the length of said one track occupied by the region in which the odd samples are recorded.

Dependencies are inferred from the claim text.

Magnetic recorder/reproducer

Life of this patent

Magnetic recorder/reproducer

Life of this patent

Abstract

Claims62