| 摘要 |
PURPOSE:To attain a coding method easy to execute program searching with large synchronizing energy of a PLL by making the data word of a sink area into a code word which is divided into every two bits and converting it to a data word containing only one of ''1'' in 4 bits. CONSTITUTION:For a coding rule of a variable length word PLL code, a data word used in a sink area is defined as a data word which is divided into every two bits. This data word of 2-bit unit is converted into a code word which contains just a single ''1'' in 4 bits. As shown in a conversion table, a code word 1000 is allotted to a data word 00. Therefore a single ''1'' is contained in 4 bits owing to said conversion rule for the code word used in a sink area. Thus a large number of synchronizing pulses are contained in a sink area in a high rate. In addition, a timing clock is produced every two bits since just a single ''1'' is contained in 4 bits. Thus nonambiguity is secured for division of data. |
