WO2002051135A1 - Multi-picture in picture system - Google Patents

Multi-picture in picture system Download PDF

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Publication number
WO2002051135A1
WO2002051135A1 PCT/IB2001/002397 IB0102397W WO0251135A1 WO 2002051135 A1 WO2002051135 A1 WO 2002051135A1 IB 0102397 W IB0102397 W IB 0102397W WO 0251135 A1 WO0251135 A1 WO 0251135A1
Authority
WO
WIPO (PCT)
Prior art keywords
picture
camera
cvbs
chain
line
Prior art date
Application number
PCT/IB2001/002397
Other languages
French (fr)
Inventor
Franciscus H. M. Bergen
Jan Klijn
Johan L. Schirris
Ronald S. A. Schram
Original Assignee
Koninklijke Philips Electronics N.V.
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 Koninklijke Philips Electronics N.V. filed Critical Koninklijke Philips Electronics N.V.
Priority to EP01271744A priority Critical patent/EP1356669A1/en
Priority to KR1020027010557A priority patent/KR20020077454A/en
Priority to JP2002552306A priority patent/JP2004516750A/en
Publication of WO2002051135A1 publication Critical patent/WO2002051135A1/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/222—Studio circuitry; Studio devices; Studio equipment
    • H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
    • H04N5/2624—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects for obtaining an image which is composed of whole input images, e.g. splitscreen
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/04—Synchronising
    • H04N5/06—Generation of synchronising signals
    • H04N5/067—Arrangements or circuits at the transmitter end
    • H04N5/073—Arrangements or circuits at the transmitter end for mutually locking plural sources of synchronising signals, e.g. studios or relay stations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/04—Synchronising
    • H04N5/06—Generation of synchronising signals
    • H04N5/067—Arrangements or circuits at the transmitter end
    • H04N5/073—Arrangements or circuits at the transmitter end for mutually locking plural sources of synchronising signals, e.g. studios or relay stations
    • H04N5/0733—Arrangements or circuits at the transmitter end for mutually locking plural sources of synchronising signals, e.g. studios or relay stations for distributing synchronisation pulses to different TV cameras
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/222—Studio circuitry; Studio devices; Studio equipment
    • H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects

Definitions

  • the invention relates to a multi-picture in picture system comprising at least two cameras linked as a chain together.
  • Cameras linked as a chain are, for example, known from WO98/39739 wherein a system is described for data processing with motion analyzes.
  • the different cameras having different degrees of information content.
  • the television/monitor which receives the pictures from the different cameras, creates the total picture to be viewed.
  • the invention has for one of its object to provide a multi-picture in picture system, which is economically constructed.
  • a multi-picture in picture system comprises the features of claim 1.
  • each picture can have the maximum frame rate.
  • a first camera acts as a system master whereby the other camera(s) are each locked to a previous camera.
  • the length of the cable which determines the total delay is no longer relevant. Instead of the known systems where the television/monitor has to cope with the multi picture in picture creation, in the system according to the invention the television/monitor has not to cope with this situation so can be much cheaper.
  • each camera creates its picture at the "place" in the total picture.
  • Fig. 1 schematically an example of a multi-picture in picture system according to the invention
  • Fig. 2 schematically an example of a screen with multi picture in pictures
  • Fig 3 schematically an example of a camera for use in a system according to the invention.
  • FIG. 1 shows schematically an example of a multi-picture in picture system MPIPS according to the invention.
  • this system comprises n camera's CAM 1 -CAMn, linked together with a CVBS signal as a daisy chain. After the last camera CAMn a monitor MON is coupled to make the result visible on a screen S of the monitor.
  • Each camera can insert on the CVBS line a part of its observed picture or a downscaled version of that picture.
  • the location and size of the inserted picture is programmable per camera.
  • a first camera CAM1 acts as a system master and the other cameras are locked to the previous camera to horizontal synchronization, vertical synchronization and color phase locked to the system/master. In this manner it is possible to cope with different delays. Because the insertion of the picture and the locking is at the same place and timing so no differences in delay occur.
  • Figure 2 shows a picture screen P2 with nine pictures 1-9 in a multi picture in picture, whereby each picture is made ready in each camera with the maximum frame rate on the CVBS signal.
  • Figure 3 shows schematically a camera CAM3x coupled with an input 13 to a previous camera (x-1) on which camera (x-1) the camera CAM3x is locked.
  • the camera records a picture on a sensor SEN3 and supplies the recorded picture to the daisy-chain (CVBS-line) at the output 03.
  • CVBS-line daisy-chain
  • the input 13 is coupled to input processing means INPROS3.
  • the input processing means supply a signal to output processing means OUTPROS3.
  • the output processing means also receives the signal from the sensor SEN3.
  • each picture can have the maximum frame rate.
  • a first camera acts as a system master whereby the other camera(s) are each locked to a previous camera.
  • the other camera(s) are each locked to a previous camera.
  • problems of different delays are overcome.
  • Each camera adds its part of the picture at the place in the daisy-chain cable where the camera also is locked. So each locking place and insertion place is the same which results in no problems with relation to unknown delays
  • the length of the cable which determines the total delay is no longer relevant.
  • the television/monitor has not to cope with this situation so can be much cheaper.
  • each camera creates its picture at the

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Closed-Circuit Television Systems (AREA)
  • Studio Devices (AREA)
  • Studio Circuits (AREA)

Abstract

Do display more than one picture on a television/monitor multi picture in picture systems are known. The invention proposes a multi picture in picture system in which each camera is coupled in a daisy chain adds its part of the complete picture on a CVBS-line. One of the main differences is that now the television/monitor don't have to prepare the complete picture because each camera does it. Further no problems with locking occur because each camera adds its picture at the ' place' where it is also locked.

Description

Multi-picture in picture system
The invention relates to a multi-picture in picture system comprising at least two cameras linked as a chain together.
Cameras linked as a chain are, for example, known from WO98/39739 wherein a system is described for data processing with motion analyzes. The different cameras having different degrees of information content.
The television/monitor, which receives the pictures from the different cameras, creates the total picture to be viewed.
The invention has for one of its object to provide a multi-picture in picture system, which is economically constructed.
To this end a multi-picture in picture system according to the invention comprises the features of claim 1.
In this way a multi-picture in picture system is obtained using a CVBS-line (Composite Video Baseband Signal). By adding each picture on the CVBS-line each picture can have the maximum frame rate.
A first camera acts as a system master whereby the other camera(s) are each locked to a previous camera.
By locking each camera to a previous camera problems of different delays are overcome. Each camera adds its part of the picture at the place in the daisy-chain cable where the camera also is locked. So each locking place and insertion place is the same which results in no problems with relation to unknown delays. This overcomes the problem prior art systems have, that is such systems have to cope with this kind of problems because the locking of the color carrier has to have a precision of about 5 nano second while a cable with a length of 100 meters can have a delay of 1 micro second.
The length of the cable which determines the total delay is no longer relevant. Instead of the known systems where the television/monitor has to cope with the multi picture in picture creation, in the system according to the invention the television/monitor has not to cope with this situation so can be much cheaper.
In the system according to the invention each camera creates its picture at the "place" in the total picture.
Embodiments of the invention are described in the dependent claims.
These and other objects of the invention are described hereinafter by way of example with reference to the non-limiting examples. Herein shows: .
Fig. 1 schematically an example of a multi-picture in picture system according to the invention,
Fig. 2 schematically an example of a screen with multi picture in pictures, and Fig 3 schematically an example of a camera for use in a system according to the invention.
Figure 1 shows schematically an example of a multi-picture in picture system MPIPS according to the invention. In this example this system comprises n camera's CAM 1 -CAMn, linked together with a CVBS signal as a daisy chain. After the last camera CAMn a monitor MON is coupled to make the result visible on a screen S of the monitor.
Each camera can insert on the CVBS line a part of its observed picture or a downscaled version of that picture. The location and size of the inserted picture is programmable per camera.
A first camera CAM1 acts as a system master and the other cameras are locked to the previous camera to horizontal synchronization, vertical synchronization and color phase locked to the system/master. In this manner it is possible to cope with different delays. Because the insertion of the picture and the locking is at the same place and timing so no differences in delay occur. Figure 2 shows a picture screen P2 with nine pictures 1-9 in a multi picture in picture, whereby each picture is made ready in each camera with the maximum frame rate on the CVBS signal.
Instead of prior art systems where the pictures 1-9 don't have the maximum frame rate and where the pictures are also not prepared on the CVBS-line.
Figure 3 shows schematically a camera CAM3x coupled with an input 13 to a previous camera (x-1) on which camera (x-1) the camera CAM3x is locked. The camera records a picture on a sensor SEN3 and supplies the recorded picture to the daisy-chain (CVBS-line) at the output 03.
The input 13 is coupled to input processing means INPROS3. The input processing means supply a signal to output processing means OUTPROS3. The output processing means also receives the signal from the sensor SEN3.
In this way a multi-picture in picture system is obtained using a CVBS-line
(Composite Video Baseband Signal). By adding each picture on the CVBS-line each picture can have the maximum frame rate.
A first camera acts as a system master whereby the other camera(s) are each locked to a previous camera. By locking each camera to a previous camera problems of different delays are overcome. Each camera adds its part of the picture at the place in the daisy-chain cable where the camera also is locked. So each locking place and insertion place is the same which results in no problems with relation to unknown delays
This overcomes the problem prior art systems have, that is such systems have to cope with this kind of problems because the locking of the color carrier has to have a precision of about 5 nano second while a cable with a length of 100 meters can have a delay of 1 micro second.
The length of the cable which determines the total delay is no longer relevant.
Instead of the known systems where the television/monitor has to cope with the multi picture in picture creation, in the system according to the invention the television/monitor has not to cope with this situation so can be much cheaper.
In the system according to the invention each camera creates its picture at the
"place" in the total picture. The man skilled in the art will be well aware that the above examples are not limitative for the invention concerned. It is of course possible to change the number of pictures or cameras. One of the main items of the invention is that in the system according to the invention for the main part the cameras prepare the pictures to be displayed on the television/monitor and not the television/monitor.

Claims

CLAIMS:
1. Multi-picture in picture system comprising at least two cameras linked as a chain together with a CVBS-line, whereby a first camera in the chain acts as a system master and the other camera(s) are locked to a previous camera in the chain.
2. Multi-picture in picture system according to claim 1 , characterized in that the multi-picture in picture system comprises locking means to horizontal synchronization, vertical synchronization and color carrier phase-locking a camera to a previous camera.
3. Multi-picture in picture system according to claim 1 , characterized in that the multi-picture in picture system comprises a monitor coupled to the chain.
4. Multi-picture in picture system according to claim 1, characterized in that at least one camera comprises means to insert on the CVBS-line a part of its observed picture.
5. Multi-picture in picture system according to claim 1 , characterized in that at least one camera comprises means to insert on the CVBS-line a down-scaled version of its observed picture.
6. Method to obtain a multi picture in picture having the steps of recording at least two pictures, coupling the information of the pictures on a chain, and displaying the multi picture in picture.
PCT/IB2001/002397 2000-12-20 2001-12-06 Multi-picture in picture system WO2002051135A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP01271744A EP1356669A1 (en) 2000-12-20 2001-12-06 Multi-picture in picture system
KR1020027010557A KR20020077454A (en) 2000-12-20 2001-12-06 Multi-picture in picture system
JP2002552306A JP2004516750A (en) 2000-12-20 2001-12-06 Picture system multi-picture

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP00204656 2000-12-20
EP00204656.3 2000-12-20

Publications (1)

Publication Number Publication Date
WO2002051135A1 true WO2002051135A1 (en) 2002-06-27

Family

ID=8172484

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2001/002397 WO2002051135A1 (en) 2000-12-20 2001-12-06 Multi-picture in picture system

Country Status (6)

Country Link
US (1) US6943846B2 (en)
EP (1) EP1356669A1 (en)
JP (1) JP2004516750A (en)
KR (1) KR20020077454A (en)
CN (1) CN1404683A (en)
WO (1) WO2002051135A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202008009834U1 (en) * 2008-07-22 2009-12-10 Liebherr-Elektronik Gmbh Camera for use in a digital network

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5144445A (en) * 1989-12-26 1992-09-01 Sanyo Electric Co., Ltd. Solid-state image pickup apparatus having a plurality of photoelectric transducers arranged in a matrix
JPH0541816A (en) * 1991-08-06 1993-02-19 Mitsubishi Electric Corp Television camera device

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL9000130A (en) * 1990-01-19 1990-05-01 Philips Nv VIDEO SYSTEM.
GB9219709D0 (en) * 1992-09-17 1992-10-28 D2B Systems Co Ltd Apparatus interconnected for the communication of control messages
US6108027A (en) * 1996-12-17 2000-08-22 Netergy Networks, Inc. Progressive still frame mode
SE511461C2 (en) 1997-03-03 1999-10-04 Qualisys Ab Data Processing
TW428412B (en) * 1998-03-20 2001-04-01 United Microelectronics Corp TV monitoring system with addressing function

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5144445A (en) * 1989-12-26 1992-09-01 Sanyo Electric Co., Ltd. Solid-state image pickup apparatus having a plurality of photoelectric transducers arranged in a matrix
JPH0541816A (en) * 1991-08-06 1993-02-19 Mitsubishi Electric Corp Television camera device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 017, no. 337 (E - 1388) 25 June 1993 (1993-06-25) *

Also Published As

Publication number Publication date
JP2004516750A (en) 2004-06-03
US20020118298A1 (en) 2002-08-29
US6943846B2 (en) 2005-09-13
CN1404683A (en) 2003-03-19
KR20020077454A (en) 2002-10-11
EP1356669A1 (en) 2003-10-29

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