JPS5661847A - Pcm signal process system - Google Patents

Pcm signal process system

Info

Publication number
JPS5661847A
JPS5661847A JP13915279A JP13915279A JPS5661847A JP S5661847 A JPS5661847 A JP S5661847A JP 13915279 A JP13915279 A JP 13915279A JP 13915279 A JP13915279 A JP 13915279A JP S5661847 A JPS5661847 A JP S5661847A
Authority
JP
Japan
Prior art keywords
frequency
sampling
process system
signal process
pcm signal
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
JP13915279A
Other languages
Japanese (ja)
Other versions
JPS6221421B2 (en
Inventor
Satoshi Kunii
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP13915279A priority Critical patent/JPS5661847A/en
Publication of JPS5661847A publication Critical patent/JPS5661847A/en
Publication of JPS6221421B2 publication Critical patent/JPS6221421B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B14/00—Transmission systems not characterised by the medium used for transmission
    • H04B14/02—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation
    • H04B14/04—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using pulse code modulation
    • H04B14/046—Systems or methods for reducing noise or bandwidth

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Analogue/Digital Conversion (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)

Abstract

PURPOSE:To improve the amplitude and group delay time characteristics in the PCM signal process system which is applied to a sound recorder or the like, by giving a band limit to the input signal to 1/2-1 times as less as the sampling frequency and then carrying out a sampling with the frequency of double the upper limit frequency of transmission. CONSTITUTION:The BPF22 gives a band limit to the audio input signal to the frequency which is larger than the 1/2 sampling frequency F and smaller than the frequency F. This output is given the A/D conversion 4 and then transmitted to the transmission line 6 after a sampling given with the frequency of double the upper limit frequency. This output is demodulated 7 and then changed from the sampling frequency F to 2F to receive the D/A conversion 27 and then to be delivered after the LPF28. In such way, both the amplitude and group delay time characteristics can be improved.
JP13915279A 1979-10-25 1979-10-25 Pcm signal process system Granted JPS5661847A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13915279A JPS5661847A (en) 1979-10-25 1979-10-25 Pcm signal process system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13915279A JPS5661847A (en) 1979-10-25 1979-10-25 Pcm signal process system

Publications (2)

Publication Number Publication Date
JPS5661847A true JPS5661847A (en) 1981-05-27
JPS6221421B2 JPS6221421B2 (en) 1987-05-12

Family

ID=15238768

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13915279A Granted JPS5661847A (en) 1979-10-25 1979-10-25 Pcm signal process system

Country Status (1)

Country Link
JP (1) JPS5661847A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59219042A (en) * 1983-05-26 1984-12-10 Nf Kairo Sekkei Block:Kk Digital analog converting method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4834659A (en) * 1971-09-07 1973-05-21
JPS522611A (en) * 1975-06-24 1977-01-10 Oki Electric Ind Co Ltd Electromagnetic drive unit for dot printer

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4834659A (en) * 1971-09-07 1973-05-21
JPS522611A (en) * 1975-06-24 1977-01-10 Oki Electric Ind Co Ltd Electromagnetic drive unit for dot printer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59219042A (en) * 1983-05-26 1984-12-10 Nf Kairo Sekkei Block:Kk Digital analog converting method

Also Published As

Publication number Publication date
JPS6221421B2 (en) 1987-05-12

Similar Documents

Publication Publication Date Title
JPS54142009A (en) Amplitude equalizer
JPS52124346A (en) Process signal transmitter
JPS5661847A (en) Pcm signal process system
JPS55122208A (en) Sound recording and reproducing system
JPS527603A (en) Narrow-band transmission system and storing system of audio signal
JPS612959B2 (en)
JPS5528630A (en) Channel divider
JPS5439118A (en) Musical sound signal converting device
JPS55133157A (en) Integrated transmission system for digital line
JPS5664528A (en) Digital transmission system
JPS54139421A (en) Signal transmission system
JPS547220A (en) Adaptive lincomlpex system
JPS56107307A (en) Code communication system
JPS5775035A (en) Information transfer method using nonaudible sound
JPS54114028A (en) Direct phase reproducing device
JPS5797225A (en) Pulse transfer system
JPS5643573A (en) Transmission system of digital type earthquake telemeter
JPS56125131A (en) Digital processing type transceiver for quadrature multiplex signal
JPS51139716A (en) Transmission-reception switching system
JPS55151831A (en) Voice transmitting device
JPS55104130A (en) Monitor system for pcm coder and decoder
JPS57188150A (en) Multiplex signal transmission system
JPS54100214A (en) Direct shift repeating installation
SE8304846L (en) FREQUENCY TRANSFER OF AN AUDIO FREQUENCY SIGNAL
JPS55133142A (en) Estimation system for gain of communication line