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Application filed by Sony CorpfiledCriticalSony Corp
Priority to MYPI0104045priorityCriticalpatent/MY125961A/en
Publication of MY125961ApublicationCriticalpatent/MY125961A/en
Digital Transmission Methods That Use Modulated Carrier Waves
(AREA)
Abstract
IN THE PRESENT INVENTION, A PARTLY DUPLEXED CONVERSION TABLE IS USED AS A CONVERSION TABLE FOR CONVERTING AN M-BIT BASED DATA STRING DIRECTLY INTO AN N-BIT BASED CODE STRING WITHOUT USING MARGIN BITS. THIS CONVERSION TABLE IS CONSTITUTED BY FIRST AND SECOND SUB-TABLES INCLUDING PLURAL CODE GROUPS, RESPECTIVELY . THE PLURAL CODE GROUPS INCLUDE DIFFERENT CODES FOR THE SAME INPUT DATA. THE SECOND SUB-TABLE IS A TABLE WHICH IS PARTLY DUPLEXED WITH THE FIRST SUB-TABLE AND IS PRODUCED BY ALLOCATING DIFFERENT CODES TO DATA FROM FIRST INPUT DATA TO SECOND INPUT DATA IN THE FIRST SUB-TABLE. THE FIRST AND SECOND SUB-TABLES ARE SO DESIGNED THAT CODE SETS OF THE DUPLEXED PORTIONS TAKE VARIANTS OF DIGITAL SUM VARIATIONS WHICH ARE OPPOSITE IN SIGN. CODES ARE ALLOCATED TO ALL THE CODE GROUPS IN THE DUPLEXED PORTIONS OF THE FIRST AND SECOND SUB-TABLES WITH RESPECT TO INPUT DATA SEQUENTIALLY FROM A CODE HAVING A MAXIMUM ABSOLUTE VALUE OF VARIANT OF DIGITAL SUM VARIATION. THUS, ACCORDING TO THE PRESENT INVENTION, LOW FREQUENCY COMPONENTS OF MODULATED SIGNALS MAY BE RESTRICTED PROPERLY.(FIG. 11)
MYPI01040451995-10-071995-10-07Signal modulating method, signal modulating apparatus, signal demodulating method and signal demodulating apparatus
MY125961A
(en)
Method of converting a series of m-bit information words to a modulated signal, method of producing a record carrier,coding device,device,recording device,signal, as well as a record carrier
CODING ARRANGEMENT AND METHOD FOR ENCODING (N-1)-BIT INFORMATION WORDS INTO N-BIT CHANNEL WORDS AND DECODING ARRANGEMENT AND METHOD FOR DECODING THE CHANNEL WORDS INTO INFORMATION WORDS
Method of converting a series of m-bit information words to a modulated signal, method of producing a record carrier, coding device, decoding device, recording device, reading device, signal, as well as a record carrier.