WO2001017263A1 - Time multiplex method for recording, transmitting and reproducing video images from different video sources - Google Patents
Time multiplex method for recording, transmitting and reproducing video images from different video sources Download PDFInfo
- Publication number
- WO2001017263A1 WO2001017263A1 PCT/EP2000/007815 EP0007815W WO0117263A1 WO 2001017263 A1 WO2001017263 A1 WO 2001017263A1 EP 0007815 W EP0007815 W EP 0007815W WO 0117263 A1 WO0117263 A1 WO 0117263A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- lines
- recording
- line
- parity
- images
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
- G08B13/189—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems
- G08B13/194—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems
- G08B13/196—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems using television cameras
- G08B13/19665—Details related to the storage of video surveillance data
- G08B13/19667—Details realated to data compression, encryption or encoding, e.g. resolution modes for reducing data volume to lower transmission bandwidth or memory requirements
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
- G08B13/189—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems
- G08B13/194—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems
- G08B13/196—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems using television cameras
- G08B13/19639—Details of the system layout
- G08B13/19645—Multiple cameras, each having view on one of a plurality of scenes, e.g. multiple cameras for multi-room surveillance or for tracking an object by view hand-over
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
- G08B13/189—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems
- G08B13/194—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems
- G08B13/196—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems using television cameras
- G08B13/19678—User interface
- G08B13/19691—Signalling events for better perception by user, e.g. indicating alarms by making display brighter, adding text, creating a sound
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/91—Television signal processing therefor
- H04N5/917—Television signal processing therefor for bandwidth reduction
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/91—Television signal processing therefor
- H04N5/92—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
- H04N5/9201—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving the multiplexing of an additional signal and the video signal
- H04N5/9205—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving the multiplexing of an additional signal and the video signal the additional signal being at least another television signal
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/91—Television signal processing therefor
- H04N5/92—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
- H04N5/926—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback by pulse code modulation
- H04N5/9261—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback by pulse code modulation involving data reduction
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/91—Television signal processing therefor
- H04N5/93—Regeneration of the television signal or of selected parts thereof
-
- 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
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
- H04N7/181—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a plurality of remote sources
Definitions
- Time-division multiplexing method for recording, transmission and playback of video images from various video sources
- the invention relates to a time-division multiplex method for recording, transmission and monitor playback of digitized video images from various video sources in a CCTV (Closed Circuit Television) system.
- the devices for video signal digitization and compression are preceded by an electronic analog crossbar switch (time-division multiplex switch). This is switched according to the recording rates to be realized for the various video sources of the CCTV system.
- the digitized and compressed video data are then recorded in a video database (recorder).
- the time frames during the permanent recording or an additional event-triggered recording for each video source usually these are video cameras, lead to a complex, generally non-deterministic time behavior for the acquisition of the individual fields and their assignment to the different multiplex channels.
- the recording grid is generally not synchronized with
- Time grid of the video sources and the field parity It is subject to constant, unpredictable changes due to the parameterization of the system or through event-controlled recording.
- An essential performance parameter of a multiplex recording of several video sources is the total frame rate.
- This code number is the proportion of fields that can be used for the recording. Due to the possibly large temporal spacing of the individual fields recorded for a multiplex channel from one another, it is not sensible to combine fields into full images. Instead, the representation on the video image monitor, for example on a PC monitor, takes place in a known manner as a scaled field by time interpolation or simple doubling. If fields of different parity are mixed in the display of a multiplex channel, this leads to a jump by two lines with the original image size, which has a visually extremely disruptive effect.
- the invention has for its object to design a time-division multiplexing method for recording, transmission and monitor playback of digitized video images from various video sources in a CCTV (Closed Circuit Television) system in such a way that better overall image rates result without loss of information and at the same time the Recording is not limited to fields of parity.
- CCTV Compact Circuit Television
- this object is achieved in that, for interlacing correction in each multiplex channel, the line offset of recorded fields is compensated for independently of their parity in such a way that they are inserted by inserting one Line between adjacent lines to full frames ex- panded, which are then used in playback.
- the different channels of a multiplexed CCTV system supply fields of both parities.
- the line offset of fields of different parity can be compensated so that the line jump no longer appears visually.
- the method according to the invention is initially based on fields of the corresponding number of lines, e.g. according to the CCIR 288 standard. These fields are expanded into frames by inserting one line between adjacent lines.
- the full image obtained in this way is displayed directly (even field) or previously processed in a further step (odd field) in such a way that no jump is noticed when the images are strung together.
- This further step can expediently consist in that special fill lines are inserted at the beginning and / or end of the full image formed from the field.
- the export of individual images from the CCTV system as an interlaced full image is also carried out in accordance with the method according to the invention.
- the recording is not limited to fields of one of the two parities and this results in the implementation considerably simpler recording algorithms than before. There is no loss of information in the video source data.
- the use of the method according to the invention also enables simpler system planning than hitherto, since the factor of field parity no longer plays a role in the planning of the recording grid.
- FIG. 1 shows a block diagram of a schematic of a CCTV (closed circuit) system working with digital multiplex recording with interlace compensation (parity correction, "parity locking") in the playback path according to the invention
- FIG. 2 shows in a line diagram a first variant of the method according to the invention for compensating for the line jump
- FIG. 3 also in a line diagram a second variant of the method according to the invention for compensating the interlacing.
- a plurality of video sources 1 a, 1 b,..., In, for example video cameras, are provided, the video signals of which are fed to an analog electronic crossbar switch 2 (time multiplexer).
- the crossbar switch 2 is therefore provided in order to reduce the number and hence the effort of compression and digitization channels.
- the crossbar switch 2 is followed by a digitizer / compressor 3, the output of which is connected to a video database 4 for storing the digitized video data.
- the crossbar switch 2 is switched in accordance with the recording rates to be implemented for the various video sources Ia, Ib, ..., In of the CCTV system.
- each video source la, lb, ... in different time frames during the uninterrupted recording and, if necessary, an additional event-controlled recording result in a complex, generally non-deterministic time behavior for the acquisition of the individual fields and their assignment to the individual multi - plex channels.
- the recording grid is generally not synchronized with the time grid of the video sources la, lb, ..., In and the field parity and, moreover, is subject to unpredictable changes.
- the digital video data which can be extracted from the video database 4 are decompressed in a decompression circuit 6 before they are treated in a line interlacing compensator 5 ("parity locking") according to the method according to the invention.
- the video data processed in the interlace compensator 5 are finally fed to a PC monitor 7 for display there in the playback path.
- the line offset of fields of different parity is compensated with the aid of an algorithm in such a way that the interlacing no longer occurs visually.
- corresponding fields of the corresponding number of lines are initially assumed (for example CCIR 288).
- interlaced compensator 5 these fields are expanded into full images by inserting one line between adjacent lines. To insert the lines, either the previous line is copied or an interpolation of two adjacent lines is carried out. The full image thus obtained with the help of the interlace compensator 5 is then directly displayed on the PC monitor 7, depending on the parity of the field from which the full image was generated, or is previously processed in a further step in such a way that there is no discernible jump in the sequence of images.
- Figures 2 and 3 illustrate the method according to the invention using two variants of the correction of line breaks.
- Figures 2 (variant 1) and 3 (variant 2) each consist of three juxtaposed representations of a line scheme, the line scheme shown on the left in each case a normal full image, the middle line scheme a padded straight field (even parity) and the one shown on the right Line scheme represent a padded odd field (odd parity).
- Figures 2 and 3 the lines of even parity with solid lines, the lines of odd parity with dashed lines, inserted fill lines with dash-dotted lines and fill lines at the end or at the beginning of an image with dotted lines are shown.
- a fill line is inserted between adjacent lines of even parity in the even field for interlace correction, and a final fill line is added below in the direction of line doubling.
- the direction of the line doubling is in the straight field from top to bottom in both variants.
- the variant 1 shown in FIG. 2 and the variant 2 shown in FIG. 3 differ only with regard to the line correction in the case of posed odd field.
- the direction of the line doubling is from bottom to top and in the second variant (FIG. 3) from top to bottom as in the even field.
- FIG. 2 the direction of the line doubling is from bottom to top and in the second variant (FIG. 3) from top to bottom as in the even field.
- the full image obtained from the odd field is supplemented beforehand by two special fill lines at the bottom, that is to say in the beginning in the direction of line doubling, so that there is no jump in the sequence of the images.
- the full image obtained from the odd field is supplemented beforehand by a special fill line at the top and a special fill line at the bottom, i.e. at the beginning and end in the direction of line doubling, so that the sequence in time of the No jump can be seen in the pictures either.
- FIGS. 2 and 3 Filling lines are identified in FIGS. 2 and 3 with a prime index for the respective line number.
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Human Computer Interaction (AREA)
- Television Signal Processing For Recording (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU68374/00A AU6837400A (en) | 1999-08-31 | 2000-08-09 | Time multiplex method for recording, transmitting and reproducing video images from different video sources |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1999141322 DE19941322B4 (en) | 1999-08-31 | 1999-08-31 | Time division multiplexing method for recording, transmission and playback of video images from various video sources |
DE19941322.3 | 1999-08-31 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001017263A1 true WO2001017263A1 (en) | 2001-03-08 |
Family
ID=7920225
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2000/007815 WO2001017263A1 (en) | 1999-08-31 | 2000-08-09 | Time multiplex method for recording, transmitting and reproducing video images from different video sources |
Country Status (4)
Country | Link |
---|---|
AU (1) | AU6837400A (en) |
DE (1) | DE19941322B4 (en) |
PL (1) | PL353391A1 (en) |
WO (1) | WO2001017263A1 (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4027333A (en) * | 1975-12-09 | 1977-05-31 | Cbs Inc. | Multiplex color television transmission system |
US5041909A (en) * | 1987-12-09 | 1991-08-20 | Pioneer Electronic Corporation | Multi-channel video signal transmission/reproduction system |
EP0633693A2 (en) * | 1993-07-01 | 1995-01-11 | Matsushita Electric Industrial Co., Ltd. | Flagged video signal recording apparatus and reproducing apparatus |
EP0749240A1 (en) * | 1995-06-14 | 1996-12-18 | Hitachi Denshi Kabushiki Kaisha | Digital video signal multiplex transmission system |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ATA871375A (en) * | 1975-11-14 | 1976-06-15 | Eumig | SYSTEM FOR THE STORAGE AND PLAYBACK OF TELEVISION SIGNALS FROM MULTIPLE SIGNAL SOURCES |
DE4211955A1 (en) * | 1992-04-09 | 1993-10-14 | Thomson Brandt Gmbh | Method and device for an interlace progressive conversion |
US6043840A (en) * | 1996-04-19 | 2000-03-28 | Alliedsignal Inc. | Apparatus and method for characterizing fiber crimps |
-
1999
- 1999-08-31 DE DE1999141322 patent/DE19941322B4/en not_active Expired - Fee Related
-
2000
- 2000-08-09 WO PCT/EP2000/007815 patent/WO2001017263A1/en not_active Application Discontinuation
- 2000-08-09 PL PL00353391A patent/PL353391A1/en unknown
- 2000-08-09 AU AU68374/00A patent/AU6837400A/en not_active Abandoned
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4027333A (en) * | 1975-12-09 | 1977-05-31 | Cbs Inc. | Multiplex color television transmission system |
US5041909A (en) * | 1987-12-09 | 1991-08-20 | Pioneer Electronic Corporation | Multi-channel video signal transmission/reproduction system |
EP0633693A2 (en) * | 1993-07-01 | 1995-01-11 | Matsushita Electric Industrial Co., Ltd. | Flagged video signal recording apparatus and reproducing apparatus |
EP0749240A1 (en) * | 1995-06-14 | 1996-12-18 | Hitachi Denshi Kabushiki Kaisha | Digital video signal multiplex transmission system |
Also Published As
Publication number | Publication date |
---|---|
AU6837400A (en) | 2001-03-26 |
PL353391A1 (en) | 2003-11-17 |
DE19941322A1 (en) | 2001-03-22 |
DE19941322B4 (en) | 2005-11-17 |
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