Two-dimensional multichannel partial response class IV recording codes

Partial response coding has recently been used in the magnetic disk recording business to increase the attainable linear density. It is also being investigated for use in magnetic tape channels, many of which use simultaneous recording on multiple tracks. Since both disk and tape are two-dimensional recording surfaces, there is promise for improvement in capacity and clocking if both dimensions are used simultaneously. While two-dimensional recording is especially suited to the multichannel tape environment it may also be useful in future disk products. This paper examines the application of partial response class IV coding to the two-dimensional, multichannel environment.<>