TH20084A - Modulation method Recording method Simulation production method Ready-made machines for recording and simulated production Recording methodology and simulation production And finished machines for simulated production - Google Patents

Abstract

??????????????????????????????????????????????????????????????????? ???? ???????????????????????????????????????????????????????????????? 0,+- 2 ??????? (0,3; 8, 10;1 ) ????????????????????????????????????????????????? 8 ???????????????? 10 ??? ??????????????????????????????????????????? ??????????????????????? 1T 4T 1T 3T 1T ???? 1T 3T 1T 4T 1T ???? T ???????????????????????????????????????? ????? ???????????????????????????????????????????????????????????????????????????????????????? ???? ?????????????????????????????????????????????????????????????????????????????????? ?????????????????????????????????? "1" ??????????????????????????? N ???? N ??????? 12 ??? 18 ?????????????????

Claims (15)

1. A modulation method for converting data into code using a digital sum of the code words after NRS-I modulation equal to 0, ±2 of the code (0, 3; 8, 10; 1). This method consists of a code selection step such that the number of consecutive "1s" in a sequence using the selected code cannot exceed N;N equal to 12 to 18, and the conversion of 8-bit data to 10-bit code using only the selected code. 2. A modulation method for converting data into code using a digital sum of the code words after NRS-I modulation equal to 0, ± 2 of the code (0,3;8,10;1). This method consists of steps of generating waveforms corresponding to two identical contiguous codes by NRS-I modulation, a sequence of consecutive codes by selecting one of the codes other than the other in such a way that the transition length is 1T, 4T, 1T, 3T, 1T or 1T, 3T, 1T, 4T, 1T, where T is the minimum length between transitions, and conversion of 8-bit data into 10-bit code using only the selected code. 3. The modulation method for converting data into code using a digital sum of the code words after NRS-I modulation equals 0, ± 2 of the code (0,3;8,10;1). This method consists of steps involving the generation of waveforms corresponding to two identical contiguous codes by NRS-I modulation. A sequence of consecutive codes is generated by selecting one code over another such that the length between transitions is 1T,4T,1T,3T,1T, or 1T,3T,1T,4T,1T, where T represents the minimum length between transitions. The number of consecutive "1s" cannot exceed N, where N equals 12 to 18 in this sequence. The 8-bit data is then converted to a 10-bit code using only the selected code. 4. The recording procedure for the recording medium consists of the following steps: code selection such that the number of consecutive "1s" in a sequence using the selected codes does not exceed N, where N equals 12 to 18, each code being a digital sum of the code words after NrZI modulation equal to 0, ± 2 of the codes (0, 3; 8, 10; 1); conversion of the 8-bit data to a 10-bit code using only the selected codes; NrZI modulation of the converted code sequence to generate a waveform; and recording the resulting waveform onto the recording medium. 5. The recording procedure for the recording medium consists of the following steps: generation of waveforms corresponding to two identical codes sequenced together from a series of consecutive codes, each code having a digital sum of code words by NRH-I modulation equal to 0, ± 2 of the code (0,3;8,10;1) by selecting one code from another such that the length between transitions is 1T, 4T, 1T, 3T, 1T or 1T, 3T, 1T, 4T, 1T, where T represents the minimum length between transitions; conversion of 8-bit data to 10-bit code using only the selected code; NRH-I modulation of the converted code sequence to generate waveforms; and recording the resulting waveforms onto the recording medium. 6. The recording method for the recording medium consists of the following steps: generation of waveforms corresponding to two identical codes sequenced together from a series of consecutive code sequences, each code having a digital sum of the code words after NrZI modulation equal to 0, ±2 of the code (0,3;8,10;1) by selecting one code over another such that the length between transitions is 1T, 4T, 1T, 3T, 1T or 1T, 3T, 1T, 4T, 1T, where T is the minimum length between transitions, generated by a number of consecutive "1s" no more than N, where N equals 12 to 18 in the code sequence; conversion of 8-bit data to 10-bit code using only the selected code; NrZI modulation of the converted code sequence to generate the waveform; and recording the resulting waveform onto the recording medium. 7. Simulation method for generating waveforms on a recording medium. These waveforms are generated by converting 8-bit data to 10-bit code using only one code, such that the number of consecutive "1s" in a sequence of consecutive codes cannot exceed N, where N equals 12 to 18. In this sequence of consecutive codes, each code has a digital sum of the code words after NrZi modulation equal to 0, ± 2 of the code (0,3;8,10;1). Then, by NrZi modulation, the sequence of consecutive codes is generated. The simulation method consists of the following steps: Type 1 partial response equalization of the generated waveform signal from the recording medium; Wirbium decoding of the equalized waveform signal to generate a waveform; NrZi demodulation of the resulting waveform to generate a sequence of codes. And the conversion of each 10-bit code of the resulting code sequence into 8-bit data for reproduction from the recording media. 8. Simulation methodology for recording media containing recorded waveforms. These waveforms are generated by converting 8-bit data to 10-bit code using an extracode such that the length between transitions is 1T, 4T, 1T, 3T, 1T or 1T, 3T, 1T, 4T, 1T, where T represents the minimum length between transitions. This is achieved by generating a waveform corresponding to two identical concatenated codes. The waveform is generated by NAZI modulating a sequence of consecutive codes, each code having a digital sum of the code words after NAZI modulation equal to 0, ±2 of the code (0,3;8,10;1). The simulation methodology consists of the following steps: Type 1 partial response equalization; generated signal. Simulation from recorded media; Wirbium decoding of the adjusted signal to generate waveforms; Nrzi demodulation of the resulting waveforms to generate a sequence of codes; and conversion of each 10-bit code of the resulting sequence into 8-bit data for simulation from recorded media. 9. The simulation method for generating waveforms on a recording medium, which are produced by converting 8-bit data to 10-bit code using only codes other than those with transition lengths of 1T, 4T, 1T, 3T, 1T or 1T, 3T, 1T, 4T, 1T (where T represents the minimum transition length), is used to generate waveforms corresponding to two identical consecutive codes. These waveforms are generated by NrZi modulation of a sequence of consecutive codes, each code having a digital sum of the code words after NrZi modulation of 0, ±2 of the code (0,3;10;1), with a number of consecutive "1s" no more than N (where N equals 12 to 18) in the sequence. Then, by NrZi modulation of the sequence of consecutive codes, the simulation method is used. It consists of the following steps: Type 1 partial response equalization of the generated signal from the recording medium; turbine decoding of the equalized signal to generate waveforms; Nrzi demodulation of the resulting waveforms to generate a code sequence; and conversion of each 10-bit code of the resulting code sequence into 8-bit data for reproduction from the recording medium. 10. A complete recording and simulation machine comprising: a conversion path for converting 8-bit data to 10-bit code using only codes other than codes such that the length between transitions is 1T, 4T, 1T, 3T, 1T or 1T, 3T, 1T, 4T, 1T, where T represents the minimum length between transitions; a waveform corresponding to two identical codes is generated by NrZI modulation of a sequence of consecutive codes, each code having a digital sum of the code word after NrZI modulation equal to 0, ±2 of the code (0, 3; 10; 1), with no more than N consecutive "1s", where N equals 12 to 18 in the code sequence; and an NrZI modulation path for NrZI modulating the code sequence from the conversion path. The NRS-I modulation path is used to generate waveforms; the recording path is used to record waveforms from the NRS-I modulation path onto a recording medium; the simulation path is used to simulate the signal from the recording medium; the equalization path is used to equalize the simulated signal from the simulation device for Type 1 partial response simulation; the Vital Bite decoding path is used to Vital Bite the equalized simulated signal generated by the waveform generation equalization path; the NRS-I demodulation path is used to demodulate the NRS-I waveform from the Vital Bite decoding path to generate a code sequence; and the decoding path is used to convert only the 10-bit code of the code sequence from the NRS-I demodulation path to 8-bit data. 11. The recording and simulation methodology consists of the following steps: Generation of corresponding waveforms—two identical codes connected sequentially—from a sequence of codes, each with a digital sum of the code words after NrZi modulation equal to 0, ± 2 of the codes (0,3;8,10;1), by selecting one code over another such that the transition length is 1T, 4T, 1T, 3T, 1T or 1T, 3T, 1T, 4T, 1T, where T is the minimum length between transitions, with no more than N consecutive "1s", where N equals 12 to 18 in the code sequence; conversion of 8-bit data to 10-bit code using only the selected code; NrZi modulation of the converted code sequence to generate waveforms; recording the resulting waveforms to a recording medium; and simulation of the signal from the recording medium. The process involves balancing the simulated signal generated from the recording medium using a Type 1 partial response; VIRBI decoding of the balanced simulated signal to generate waveforms; NRS-I demodulation of the VIRBI-decoded waveforms to generate a code sequence; and converting each 10-bit code of the NRS-I demodulated code sequence into 8-bit data. 12. A complete simulation unit for recording media, comprising: simulation pathways for simulating signals from the recording media contained within this unit and outputting the simulated signal as an output; an equalization pathway one for equalizing the simulated signal from the type 1 partial response simulation pathway; a turbine decoding pathway for turbine decoding the simulated signal equalized by equalization pathway one to simulate the waveform; an equalization pathway two for integral equalization of the simulated signal from the simulation pathway; a binary encoding pathway for binary encoding the simulated signal equalized by equalization pathway two to simulate the waveform; a switching pathway for selecting one waveform from the turbine decoding pathway and one waveform from the binary encoding pathway; and an NrZi demodulation pathway for NrZi demodulating the selected waveform. The switching path is used to generate a simulated sequence of codes; and the control path is used to detect the density of the recording media contained in the finished device, and to control the switching path to select the waveform from the wireless decoding path when the detection result shows that the recording media density is high, and to select the waveform from the binary encoding path when the detection result shows that the recording media density is low. 13. A finished machine for the production of a replica of the recording medium as entitled in claim 12, whereby the recording medium is enclosed in a cartridge, which contains an identifier for identifying the recording density of the enclosed recording medium. 14. A finished instrument for the production of a replica of the recording medium as claimed in claim 12, whereby the recording medium is a tape-like recording medium enclosed in a cartridge that specifies the linear recording density of that tape-like recording medium. 15. A finished instrument for the production of simulations for the recording media as entitled in claim 12, which further comprises a means for the production of a selectable clock signal simulation using waveform lines from the first or second equalization path by the switching path and is optimized for the production of a channel clock signal simulation based on the supplied waveform lines.