WO1995018504A3 - Method and apparatus for reducing precoding loss when using a post-comb filtering approach to reduce co-channel interference in high definition television transmission - Google Patents

Method and apparatus for reducing precoding loss when using a post-comb filtering approach to reduce co-channel interference in high definition television transmission Download PDF

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Publication number
WO1995018504A3
WO1995018504A3 PCT/IB1994/000412 IB9400412W WO9518504A3 WO 1995018504 A3 WO1995018504 A3 WO 1995018504A3 IB 9400412 W IB9400412 W IB 9400412W WO 9518504 A3 WO9518504 A3 WO 9518504A3
Authority
WO
WIPO (PCT)
Prior art keywords
post
channel interference
errors
reduce
symbol
Prior art date
Application number
PCT/IB1994/000412
Other languages
French (fr)
Other versions
WO1995018504A2 (en
Inventor
Samir Narayan Hulyalkar
Original Assignee
Philips Electronics N.V.
Philips Norden Ab
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 Philips Electronics N.V., Philips Norden Ab filed Critical Philips Electronics N.V.
Priority to EP95901571A priority Critical patent/EP0685138A1/en
Priority to JP51787095A priority patent/JP4014627B2/en
Publication of WO1995018504A2 publication Critical patent/WO1995018504A2/en
Publication of WO1995018504A3 publication Critical patent/WO1995018504A3/en

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
    • H04N21/238—Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
    • H04N21/2383—Channel coding or modulation of digital bit-stream, e.g. QPSK modulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
    • H04L25/40—Transmitting circuits; Receiving circuits
    • H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
    • H04L25/497—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems by correlative coding, e.g. partial response coding or echo modulation coding transmitters and receivers for partial response systems
    • 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
    • H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving MPEG packets from an IP network
    • H04N21/4382—Demodulation or channel decoding, e.g. QPSK demodulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/015—High-definition television systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/08—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division
    • H04N7/0803—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division using frequency interleaving, e.g. with precision offset

Abstract

A system for transmitting and receiving digital data which utilizes pre-coding at a transmitter, and selects post-coding at a receiver when co-channel interference or post-comb processing at the receiver when co-channel interference is present. The system comprises a symbol interleaver at the transmitter and a symbol deinterleaver at the receiver which minimizes the byte errors by organizing the data input at the pre-coder at the transmitter such that the symbol errors and their respective propagated errors are re-organized so as to be disposed adjacent to each other, thereby forming adjacent symbol errors. The effect of this re-organization is to increase the probability that each pair of adjacent symbol errors correspond to bits which lie in the same byte.
PCT/IB1994/000412 1993-12-20 1994-12-12 Method and apparatus for reducing precoding loss when using a post-comb filtering approach to reduce co-channel interference in high definition television transmission WO1995018504A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP95901571A EP0685138A1 (en) 1993-12-20 1994-12-12 Method and apparatus for reducing precoding loss when using a post-comb filtering approach to reduce co-channel interference in high definition television transmission
JP51787095A JP4014627B2 (en) 1993-12-20 1994-12-12 High-definition television system and transmitter and receiver used therefor

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US17047193A 1993-12-20 1993-12-20
US08/170,471 1993-12-20

Publications (2)

Publication Number Publication Date
WO1995018504A2 WO1995018504A2 (en) 1995-07-06
WO1995018504A3 true WO1995018504A3 (en) 1995-07-27

Family

ID=22619981

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB1994/000412 WO1995018504A2 (en) 1993-12-20 1994-12-12 Method and apparatus for reducing precoding loss when using a post-comb filtering approach to reduce co-channel interference in high definition television transmission

Country Status (3)

Country Link
EP (1) EP0685138A1 (en)
JP (1) JP4014627B2 (en)
WO (1) WO1995018504A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1065392C (en) * 1998-08-04 2001-05-02 国家科学技术委员会高技术研究发展中心 Method for realization of data interweaving and deinterweaving using dynamic RAM

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4833693A (en) * 1985-11-21 1989-05-23 Codex Corporation Coded modulation system using interleaving for decision-feedback equalization
GB2226206A (en) * 1988-12-14 1990-06-20 Stc Plc Hybrid PCM/DPCM codec
US5052000A (en) * 1989-06-09 1991-09-24 At&T Bell Laboratories Technique for improving the operation of decision feedback equalizers in communications systems utilizing error correction
US5121203A (en) * 1990-10-19 1992-06-09 Zenith Electronics Corporation HDTV transmission system with reduced NTSC CO-channel interference
FR2678452A1 (en) * 1991-06-25 1992-12-31 Thomson Csf Method and device for protection against bit errors and losses of cells in an asynchronous time-division network for audiovisual services

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4833693A (en) * 1985-11-21 1989-05-23 Codex Corporation Coded modulation system using interleaving for decision-feedback equalization
GB2226206A (en) * 1988-12-14 1990-06-20 Stc Plc Hybrid PCM/DPCM codec
US5052000A (en) * 1989-06-09 1991-09-24 At&T Bell Laboratories Technique for improving the operation of decision feedback equalizers in communications systems utilizing error correction
US5121203A (en) * 1990-10-19 1992-06-09 Zenith Electronics Corporation HDTV transmission system with reduced NTSC CO-channel interference
FR2678452A1 (en) * 1991-06-25 1992-12-31 Thomson Csf Method and device for protection against bit errors and losses of cells in an asynchronous time-division network for audiovisual services

Also Published As

Publication number Publication date
JPH08511149A (en) 1996-11-19
EP0685138A1 (en) 1995-12-06
WO1995018504A2 (en) 1995-07-06
JP4014627B2 (en) 2007-11-28

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