RLL code is normally defined by code rules that can support a higher density into a larger sequence of channel bits during encoding.
In the hybrid memory on the encoding side of the digital channel a 16 bit digital data input word stream is replaced by a variable length (2,7) RLL code.
Assuming that input words 16 bit long are used, then, since subtraction of successive words is required for the channel RLL code, two input words of a total length of 32 bits are required, Taking the example of Figure 1, for (2,7) code, there can be 5 'O's before the 1' and 7 'O's after the '1'
Eleven were established firms, meaning that they had previously offered models based on MFM technology; two were entrants, meaning that their initial products employed RLL codes.
Table 6 Numbers of Established and Entrant Firms Introducing Models Equipped with Thin-Film Heads and RLL Recording Codes, 1976-1988 Year Thin Film Heads RLL Codes No.