TH44874A - Message carrier Encoding device Encryption method Decoding device And how to decipher - Google Patents

Abstract

DC60 (12/04/43) This invention relates to a message carrier consisting of a run-type limit marker located in the run-type track of the marker, represented as bits of the main channel, and markers with variations of other parameters are represented as bits of the auxiliary channel. Not all markers exhibit such variations; only predefined run-type markers exhibit such variations. This invention also relates to encoding devices, encoding methods, decoding devices, and decoding methods. This invention relates to a message carrier consisting of a run-type limit marker located in the run-type track of the marker, represented as bits of the main channel, and markers with variations of other parameters are represented as bits of the auxiliary channel. Not all markers exhibit such variations; only predefined run-type markers exhibit such variations. This invention also relates to encoding devices, encoding methods, decoding devices, and decoding methods.

Claims (13)

1. The vehicle carries a message containing the run-lens limit marker in the run-lens track. The marker is displayed as a bit of the main channel, and markers with variations in other parameters are displayed as bits of the backup signal. The predefined run-lens markers will have such variations. 2. The vehicle carrying the message as claimed in Claim 1 shall have parameters of sign width or space. 3. The vehicle carrying the message as claimed in claim 1 or 2, the run limit data will comply with the covenant d=2, k=10 and have a pre-defined minimum run limit of 6. 4. The message delivery vehicle, as claimed in Claim 1, will also include error correction data with backup signal channels. 5. Vehicles carrying the messages claimed in Requisition I shall be marked with pit and land pits. Pit depth shall be reduced, and land pit depth shall be only slightly greater. 6. An encoding device consisting of conversion methods for converting the binary source signal into a channel signal. The channel signal consists of the main channel signal represented as main channel bits and the backup channel signal represented as backup channel bits. The conversion method includes runt detection of the main channel bits, and the conversion method includes an interpolation method to generate the backup channel signal only when a minimum runt is detected as previously defined. 7. The device claimed in claim 6 shall also include a writing method for writing channel signals onto a recording vehicle. 8. An encoding method consisting of steps for converting the binary source signal into a channel signal. The channel signal consists of the main channel signal, represented as the main channel bits, and the backup channel signal, represented as the backup channel bits. The method includes steps for detecting the runt of the main channel bits and a method involving interpolation to generate the backup channel signal only when a predefined minimum runt is detected. 9. The inspection method claimed in claim 8 shall also include the procedure of writing the signal of the channel onto the recording vehicle. 10. A decoding device consisting of a method for decoding the channel signal into a binary source signal; a channel signal consisting of the main channel signal and its bits; and a backup channel signal consisting of its bits. The device includes a detection method for detecting the runnance of the main channel bits and a decoding method for detecting the backup signal only when the minimum runnance of the main channel bits has been detected, as previously defined. 11. The device referred to in claim 10 shall also include a read mechanism for reading signals of the channel from the recording vehicle. 12. The decoding method consists of steps for decoding the channel signal into a binary source signal. The channel signal consists of the main channel signal, which comprises the main channel bits, and the backup channel signal, which comprises the backup channel bits. The method includes steps for detecting the runline of the main channel bits, and a method that includes steps for detecting the backup channel only when the minimum runline of the runline, as previously defined, is detected. 13. The method claimed in claim 12 shall also include the procedure of reading the signal of the channel from the recording vehicle.