MY113404A - Signal modulating method, signal modulating apparatus, signal demodulating method and signal demodulating apparatus - Google Patents

Signal modulating method, signal modulating apparatus, signal demodulating method and signal demodulating apparatus

Info

Publication number
MY113404A
MY113404A MYPI95003008A MYPI19953008A MY113404A MY 113404 A MY113404 A MY 113404A MY PI95003008 A MYPI95003008 A MY PI95003008A MY PI19953008 A MYPI19953008 A MY PI19953008A MY 113404 A MY113404 A MY 113404A
Authority
MY
Malaysia
Prior art keywords
sub
signal
input data
code
duplexed
Prior art date
Application number
MYPI95003008A
Inventor
Okazaki Toru
Yoshimura Shunji
Original Assignee
Sony Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sony Corp filed Critical Sony Corp
Priority to MYPI95003008A priority Critical patent/MY113404A/en
Publication of MY113404A publication Critical patent/MY113404A/en

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  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

IN THE PRESENT INVENTION, A PARTLY DUPLEXED CONVERSION TABLE (23) IS USED AS A CONVERSION TABLE (23) FOR CONVERTING AN M-BIT BASED DATA STRING DIRECTLY INTO AN N-BIT BASED CODE STRING WITHOUT USING MARGIN BITS; THIS CONVERSION TABLE (23) 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 THE DIGITAL SUM VARIATION. THUS, ACCORDING TO THE PRESENT INVENTION, LOW FREQUENCY COMPONENTS OF MODULATED SIGNALS MAY BE RESTRICTED PROPERLY. (FIG. 11)
MYPI95003008A 1995-10-07 1995-10-07 Signal modulating method, signal modulating apparatus, signal demodulating method and signal demodulating apparatus MY113404A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
MYPI95003008A MY113404A (en) 1995-10-07 1995-10-07 Signal modulating method, signal modulating apparatus, signal demodulating method and signal demodulating apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
MYPI95003008A MY113404A (en) 1995-10-07 1995-10-07 Signal modulating method, signal modulating apparatus, signal demodulating method and signal demodulating apparatus

Publications (1)

Publication Number Publication Date
MY113404A true MY113404A (en) 2002-02-28

Family

ID=81459334

Family Applications (1)

Application Number Title Priority Date Filing Date
MYPI95003008A MY113404A (en) 1995-10-07 1995-10-07 Signal modulating method, signal modulating apparatus, signal demodulating method and signal demodulating apparatus

Country Status (1)

Country Link
MY (1) MY113404A (en)

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