JPS5485619A - Digital transmission device - Google Patents

Digital transmission device

Info

Publication number
JPS5485619A
JPS5485619A JP15392077A JP15392077A JPS5485619A JP S5485619 A JPS5485619 A JP S5485619A JP 15392077 A JP15392077 A JP 15392077A JP 15392077 A JP15392077 A JP 15392077A JP S5485619 A JPS5485619 A JP S5485619A
Authority
JP
Japan
Prior art keywords
information
buffer memory
unit
amount
memory unit
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
JP15392077A
Other languages
Japanese (ja)
Other versions
JPS63977B2 (en
Inventor
Masahiko Iijima
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co Ltd
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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP15392077A priority Critical patent/JPS5485619A/en
Priority to US05/970,051 priority patent/US4215369A/en
Priority to CA318,184A priority patent/CA1132243A/en
Publication of JPS5485619A publication Critical patent/JPS5485619A/en
Publication of JPS63977B2 publication Critical patent/JPS63977B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/236—Assembling of a multiplex stream, e.g. transport stream, by combining a video stream with other content or additional data, e.g. inserting a URL [Uniform Resource Locator] into a video stream, multiplexing software data into a video stream; Remultiplexing of multiplex streams; Insertion of stuffing bits into the multiplex stream, e.g. to obtain a constant bit-rate; Assembling of a packetised elementary stream
    • H04N21/2365—Multiplexing of several video streams
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/22—Arrangements affording multiple use of the transmission path using time-division multiplexing
    • H04L5/24—Arrangements affording multiple use of the transmission path using time-division multiplexing with start-stop synchronous converters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/434—Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream
    • H04N21/4347—Demultiplexing of several video streams

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Dc Digital Transmission (AREA)
  • Communication Control (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Time-Division Multiplex Systems (AREA)

Abstract

PURPOSE:To set the capacity of the reception buffer memory unit to the minimum necessary amount by setting the propagation delay time to the prescribed value for the information from the input of the transmission buffer memory unit to the output of the reception buffer memory unit. CONSTITUTION:At the transmission terminal, the transmitting information amount which is read out from transmission buffer memory unit 112 and then transmitted in a fixed time is counted through transmitting information amount counter circuit 115, and the transmitting information amount and the information storage amount of unit 112 are transmitted in the form of the control information through control information multiplying circuit 113. While at the reception terminal, the control information is isolated 121 from the receiving information, and the output and the reading time of the information given from reception buffer memory 122 are controlled 123 in order to secure the constant setting to a fixed time for the propagation delay time of the information from the input of unit 112 to the output of 122. Thus, the memory capacity of unit 122 can be set to the minimum necessary amount.
JP15392077A 1977-12-20 1977-12-20 Digital transmission device Granted JPS5485619A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP15392077A JPS5485619A (en) 1977-12-20 1977-12-20 Digital transmission device
US05/970,051 US4215369A (en) 1977-12-20 1978-12-15 Digital transmission system for television video signals
CA318,184A CA1132243A (en) 1977-12-20 1978-12-19 Digital transmission system for television video signals

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15392077A JPS5485619A (en) 1977-12-20 1977-12-20 Digital transmission device

Publications (2)

Publication Number Publication Date
JPS5485619A true JPS5485619A (en) 1979-07-07
JPS63977B2 JPS63977B2 (en) 1988-01-09

Family

ID=15572974

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15392077A Granted JPS5485619A (en) 1977-12-20 1977-12-20 Digital transmission device

Country Status (1)

Country Link
JP (1) JPS5485619A (en)

Also Published As

Publication number Publication date
JPS63977B2 (en) 1988-01-09

Similar Documents

Publication Publication Date Title
JPS5327332A (en) Sound response unit of entirely double type
JPS5392613A (en) Data transmission system
JPS5485619A (en) Digital transmission device
JPS5768949A (en) Buffer memory control system in packet transmission
JPS5442961A (en) Receiver
JPS5415620A (en) Buffer memory unit
JPS52110531A (en) Memory unit
JPS56748A (en) Phase control circuit
JPS5438732A (en) Input/output order accepting system
JPS54128215A (en) Buffer memory unit
JPS5733472A (en) Memory access control system
JPS53113437A (en) Semiconductor memory unit
JPS56106451A (en) Multiplication/isolation circuit
JPS5411648A (en) Semiconductor memory unit
JPS5718069A (en) Information storage device
SU653751A1 (en) Apparatus for remote checking of linear regenerators
JPS56168251A (en) Data transfer buffer system
JPS5781760A (en) Highway test device
JPS57191750A (en) Buffer memory device
JPS5440006A (en) Buffer control unit
JPS57119543A (en) Control station device
JPS56105549A (en) Memory controlling unit
JPS5329480A (en) Program controller
JPS57189256A (en) Digital signal processor
JPS5620362A (en) Error information system