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WO2008019808A1 - Dispositif de réception et procédé pour surveiller les propriétés de réception d'un signal tv, associé à l'amélioration d'une diversité de programme entre des programmes analogues et numériques - Google Patents

Dispositif de réception et procédé pour surveiller les propriétés de réception d'un signal tv, associé à l'amélioration d'une diversité de programme entre des programmes analogues et numériques Download PDF

Info

Publication number
WO2008019808A1
WO2008019808A1 PCT/EP2007/007137 EP2007007137W WO2008019808A1 WO 2008019808 A1 WO2008019808 A1 WO 2008019808A1 EP 2007007137 W EP2007007137 W EP 2007007137W WO 2008019808 A1 WO2008019808 A1 WO 2008019808A1
Authority
WO
WIPO (PCT)
Prior art keywords
trigger
level
host controller
signal
information
Prior art date
Application number
PCT/EP2007/007137
Other languages
German (de)
English (en)
Inventor
Markus Lausterer
Original Assignee
Hirschmann Car Communication Gmbh
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 Hirschmann Car Communication Gmbh filed Critical Hirschmann Car Communication Gmbh
Priority to EP07786663A priority Critical patent/EP2055097A1/fr
Publication of WO2008019808A1 publication Critical patent/WO2008019808A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J1/00—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general
    • H03J1/0008—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general using a central processing unit, e.g. a microprocessor
    • H03J1/0058—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general using a central processing unit, e.g. a microprocessor provided with channel identification means
    • H03J1/0066—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general using a central processing unit, e.g. a microprocessor provided with channel identification means with means for analysing the received signal strength
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/12—Arrangements for observation, testing or troubleshooting
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/20—Arrangements for broadcast or distribution of identical information via plural systems
    • H04H20/22—Arrangements for broadcast of identical information via plural broadcast systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/26—Arrangements for switching distribution 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 encoded video stream packets from an IP network
    • H04N21/4383—Accessing a communication channel
    • 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
    • H04N21/442—Monitoring of processes or resources, e.g. detecting the failure of a recording device, monitoring the downstream bandwidth, the number of times a movie has been viewed, the storage space available from the internal hard disk
    • H04N21/44209—Monitoring of downstream path of the transmission network originating from a server, e.g. bandwidth variations of a wireless network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/50—Tuning indicators; Automatic tuning control

Definitions

  • Receiving device and method for monitoring the reception characteristics of a TV signal and associated improvement of a program diversity between analog and digital programs are described.
  • the invention relates to a method and a mobile receiving device for terrestrial TV signals, which significantly improves program diversity between analog and digital TV programs.
  • Program diversity is a process that gives the viewer the opportunity to view the desired program even over long distances.
  • the TV receiver automatically switches the frequencies that are emitted in a transmitter landscape of several distant transmitters, so that the viewer can always actively pursue the channel with the best quality.
  • the invention is therefore based on the object to provide a receiving device and a method for monitoring the reception characteristics of a TV signal and switching, whereby the above-described requirements can be realized.
  • the device consists of two blocks, which are considered in more detail below and with reference to FIG. 1 (block diagram of the receiving device).
  • the receiving unit converts the received RF signals into video data and thereby evaluates the information about the quality of the received video signal and sends this information to a HOST controller.
  • the information includes, among other things, the level (analog and digital), signal-to-noise ratio S / N (analog and digital), bit error rate (purely digital), packet error rate (purely digital) and other appropriate parameters.
  • the mathematical unit evaluates the information of the transmitter landscape and signals specific events to the host controller. This decides whether the receiving unit changes to another channel in order to receive better reception there.
  • the method according to the invention is implemented mainly in the mathematical unit of the host controller. But only through the interaction between the mathematical unit, host controller and receiving device, the invention can be used effectively.
  • the procedure of the mathematical unit is considered more closely.
  • the drive of a vehicle in which the device according to the invention is installed is assumed to be from a heavily supplied digital area into an analog, digital mixed area.
  • the first quantity that is evaluated by the Mathematical Unit is the level. Based on the level, the reception characteristics of a signal can be monitored relatively accurately.
  • the values a o , ß ⁇ , ß 2 must be adjusted in accordance with the processor used so that the filtering can be carried out effectively.
  • FIG. 5 shows the graphical representation of the filtered level.
  • the level is not just used as an absolute value in the mathematic unit. Important for a quick evaluation of the reception conditions is also the change of the level. This information is obtained when deriving the level.
  • the level is filtered using formula 2 and derived from formula 5.
  • the controller in the host sets various thresholds for the filtering and the derivation in the mathematical unit. On the basis of these thresholds, the filter block and the derivation block triggers a trigger, on the basis of which the control triggers a signaling for the receiving unit.
  • Figure 6 shows a refined according to the above embodiments block diagram.
  • bit error rate and the packet error rate are additionally used.
  • the mathematical unit has additional triggers that can be evaluated by the controller in the host and used to effectively switch channels in the receiver.
  • Figure 7 shows a corresponding block diagram of the host controller with mathematical unit.
  • the controller in the host controller receives at least 3 trigger signals from the mathematical unit:
  • Level This is divided into an absolute value and the derived value (level changes).
  • the most important trigger in the evaluation is the packet error rate. If errors occur here, they are always visible in the picture. The bit error rate and the level give only a tendency of the expected signal curve. The following links were created with this information.
  • the triggers for the trigger trigger are changed in order to get new changes • If a trigger is triggered via the BER and no trigger of the PER occurs, the thresholds for trigger triggering are also changed here
  • FIG. 1 A block diagram of the host controller implementing the above embodiments is shown in FIG. 1
  • This method in conjunction with the mathematical unit used, allows a mobile terrestrial TV signal receiver to perform effective, secure and fast program diversity between analog and digital programs.
  • TV signal signals that correspond to a television standard and contain the required information of a television signal (picture sound, useful signals).

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Multimedia (AREA)
  • Databases & Information Systems (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Circuits Of Receivers In General (AREA)
  • Radio Transmission System (AREA)

Abstract

L'invention concerne un procédé, ainsi qu'un dispositif conçu pour réaliser ce procédé, pour surveiller les propriétés de réception d'un signal TV. Des signaux haute fréquence sont reçus via au moins une antenne. Selon l'invention, une unité de réception dotée de n voies de réception transforme les signaux HF reçus en données vidéo et elle analyse ainsi les informations relatives à la qualité du signal vidéo reçu puis envoie ces informations à un contrôleur hôte. Le contrôleur hôte analyse les informations du site émetteur grâce à une unité mathématique et signale certains événements. Il décide alors si l'unité de réception doit changer de canal ou pas pour obtenir une meilleure réception.
PCT/EP2007/007137 2006-08-17 2007-08-11 Dispositif de réception et procédé pour surveiller les propriétés de réception d'un signal tv, associé à l'amélioration d'une diversité de programme entre des programmes analogues et numériques WO2008019808A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07786663A EP2055097A1 (fr) 2006-08-17 2007-08-11 Dispositif de réception et procédé pour surveiller les propriétés de réception d'un signal tv, associé à l'amélioration d'une diversité de programme entre des programmes analogues et numériques

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006038662.0 2006-08-17
DE102006038662 2006-08-17

Publications (1)

Publication Number Publication Date
WO2008019808A1 true WO2008019808A1 (fr) 2008-02-21

Family

ID=38616334

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2007/007137 WO2008019808A1 (fr) 2006-08-17 2007-08-11 Dispositif de réception et procédé pour surveiller les propriétés de réception d'un signal tv, associé à l'amélioration d'une diversité de programme entre des programmes analogues et numériques

Country Status (3)

Country Link
EP (1) EP2055097A1 (fr)
CN (1) CN101507265A (fr)
WO (1) WO2008019808A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0978940A1 (fr) * 1998-08-06 2000-02-09 Pioneer Corporation Système récepteur de radiodiffusion
DE19857888A1 (de) * 1998-12-17 2000-10-19 Becker Gmbh DAB-Empfänger mit einem RDS-FM-Empfänger
US20040198217A1 (en) * 2002-05-02 2004-10-07 Chinmei Chen Lee Follow-me broadcast reception method and system

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2113959T3 (es) * 1991-11-01 1998-05-16 Thomson Consumer Electronics Sistema y receptor de radiodifusion.
FI942971A0 (fi) * 1994-06-20 1994-06-20 Nokia Technology Gmbh Foerfarande foer vaexling av signalkaelle i mottagaren i ett digitalt universalsaendningssystem, samt mottagare foer digitalt universalsaendningssystem
US5774195A (en) * 1995-01-24 1998-06-30 Kabushiki Kaisha Toshiba Broadcasting system discriminating television receiver for differentiating between analog and digital telecast signals
JP3490619B2 (ja) * 1998-11-24 2004-01-26 株式会社東芝 デジタル放送受信装置
KR100605821B1 (ko) * 2003-10-23 2006-07-31 삼성전자주식회사 이동통신 단말기의 위치정보를 이용한 방송채널 제어장치및 방법

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0978940A1 (fr) * 1998-08-06 2000-02-09 Pioneer Corporation Système récepteur de radiodiffusion
DE19857888A1 (de) * 1998-12-17 2000-10-19 Becker Gmbh DAB-Empfänger mit einem RDS-FM-Empfänger
US20040198217A1 (en) * 2002-05-02 2004-10-07 Chinmei Chen Lee Follow-me broadcast reception method and system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP2055097A1 *

Also Published As

Publication number Publication date
EP2055097A1 (fr) 2009-05-06
CN101507265A (zh) 2009-08-12

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