WO2003056812A1 - Procede de production d'une image composee de deux images stockees - Google Patents

Procede de production d'une image composee de deux images stockees Download PDF

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Publication number
WO2003056812A1
WO2003056812A1 PCT/EP2002/014265 EP0214265W WO03056812A1 WO 2003056812 A1 WO2003056812 A1 WO 2003056812A1 EP 0214265 W EP0214265 W EP 0214265W WO 03056812 A1 WO03056812 A1 WO 03056812A1
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WO
WIPO (PCT)
Prior art keywords
image
memory
video signals
area
represent
Prior art date
Application number
PCT/EP2002/014265
Other languages
English (en)
Inventor
Reiner Noske
Original Assignee
Bts Holding International Bv
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 Bts Holding International Bv filed Critical Bts Holding International Bv
Priority to AU2002356656A priority Critical patent/AU2002356656A1/en
Publication of WO2003056812A1 publication Critical patent/WO2003056812A1/fr

Links

Classifications

    • 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
    • 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
    • H04N21/431—Generation of visual interfaces for content selection or interaction; Content or additional data rendering
    • H04N21/4312—Generation of visual interfaces for content selection or interaction; Content or additional data rendering involving specific graphical features, e.g. screen layout, special fonts or colors, blinking icons, highlights or animations
    • H04N21/4316—Generation of visual interfaces for content selection or interaction; Content or additional data rendering involving specific graphical features, e.g. screen layout, special fonts or colors, blinking icons, highlights or animations for displaying supplemental content in a region of the screen, e.g. an advertisement in a separate window
    • 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
    • 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
    • H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
    • H04N21/44004—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving video buffer management, e.g. video decoder buffer or video display buffer
    • 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
    • H04N21/47—End-user applications

Definitions

  • the invention relates to a method for producing an image which is composed of two stored images, with video signals which represent both images being buffer-stored by means of a random access memory (SDRAM) .
  • SDRAM random access memory
  • the so-called split screen method is used for setting the correction factors when scanning the films, in which the colorist stores one of the images as a reference image and can see a portion of this reference image, for example half of it, during subsequent correction of further images, on the control monitor alongside the respective image to be corrected (main image) and, if necessary, the colors of the image to be corrected can be matched to those of the reference image.
  • Modern film scanners have a frame memory, which, in detail, has various functions depending on the embodiments of the film scanner, for example conversion of progressive video signals to video signals with intermediate lines, reading of the video signals in accordance with various Standards or reproduction at rates other than the standard rate (slow motion, quick motion, - " still pictures).
  • standard rate slow motion, quick motion, - " still pictures
  • the method according to the invention is distinguished in that video signals which represent a first image are written to a first memory area, and video signals which represent at least one second image are written to at least one second memory area in the random access memory, wherein video signals are read pixel-by-pixel alternately from the first memory area and from the at least one second memory area, and wherein video signal components of the first image in a first image area and video signal components of the at least one second image in a second image area are passed to an output.
  • the method according to the invention makes use, in a particularly advantageous, manner, of the characteristics of the memories which are used in the method of the generic type of the main claim.
  • These memories which are in particular in the form of film scanners, require a relatively large capacity in any case so that it is possible to store a second image - also referred to as a reference image in the following text - with little effort. If necessary, a number of reference images may also be stored.
  • the process of reading the memory pixel- by-pixel can also be carried out with little effort by suitable addressing.
  • SDRAMs allow simple switching of the bank address for this purpose.
  • the process of reading pixel-by-pixel allows particularly advantageous further processing and selection of the images, without any additional memory being required for producing the split screen image.
  • a further advantage of the method according to the invention is that the video signals which are read from the memory contain in their entirety both the main image and the at least one reference image. For selection of the components of the various images, there is then no need to revert to addressing and controlling the main memory (SDRAM) .
  • SDRAM main memory
  • the boundary between the main image and the reference image can be varied as required by means of a key signal, without any change being required to the addressing.
  • the random access memory may be followed by a further memory (FIFO) , which is configured for writing and reading at different clock rates.
  • FIFO further memory
  • these devices have a controller for reading from the random access memory, which takes account of the filling level of the further memory.
  • the method according to the invention provides for such devices that the video signals, which are read alternately pixel-by-pixel, are written to the further memory, and that, from the video signals which are read from the further memory, video signal components of the first image in a first image area and video signal components of the at least one second image in a second image area are passed to an output. This avoids any further increase in the addressing complexity for the process of addressing the random access memory, which process is already extremely complicated in any case.
  • one development of the invention provides that the video signals are written, split into a number of parallel data streams, to the random access memory and are read in a number of parallel data streams from the random access memory, are passed through the further memory and are then combined to form a video signal which contains both images.
  • the image which is composed of the two images can be produced in a particularly advantageous manner in that the video signals which are read from the further memory are passed on in such a way that the data streams which represent the first image are separated from one another by the data streams which represent the second image, and the data which is associated with the respective image area is selected from the separate data streams as a function of a binary split signal .
  • Figure 1 shows a memory device which is designed for carrying out the method according to the invention
  • Figure 2 shows, schematically, the illustration of how the video signals are split into a number of data streams
  • FIG. 3 shows, schematically, read and write processes, as well as the control of SDRAM which is carried out between these processes
  • FIG. 4 and Figure 5 show schematic illustrations of video data
  • Figure 6 shows a split image, likewise illustrated schematically.
  • FIG. 1 Description of the exemplary embodiment
  • the arrangement shown in Figure 1 is supplied via an input 2 with digital video signals which are split, in a demultiplexer 3, into four parallel data streams. This is done by first of all in each case buffer-storing digital video signals with a delay equal to the duration of one pixel, and then in each case taking the data of a pixel from the four delayed digital video signals at the same time.
  • This process is illustrated schematically in Figure 2, with pulses for in each case one television line being illustrated in line a, for example horizontal pulses from the digital video signals supplied at 2.
  • Lines b to e show the digital video signals which are each being delayed by the duration of one pixel, with the pixels being numbered 0 to 9, etc.
  • the pixels identified by vertical rectangles are then transmitted in parallel to the SDRAM 1 ( Figure 1) . These are the pixels 0, 1, 2, 3 at the time tl, and the pixels 4, 5, 6, 7 at the time t2.
  • This splitting between four channels and writing of the respective fourth pixel results in data packets which are compressed
  • One color component of one pixel is in each case reproduced by a data word with a length of 10 bits. However, other bit lengths are also possible.
  • the processing of a number of color components is not shown in detail in the exemplary embodiment . It can be assumed that a number of data streams, for example for R, G and B or Y, CR and CB, are processed in parallel in a corresponding manner. It is likewise possible, when supplying video signals which are based on progressive scanning and are used later as video signals with an intermediate line, to provide separate memories or memory areas for the even-numbered and odd- numbered lines.
  • the data streams indicated in the lines b to e in Figure 2 are then written to the random access memory 1, where they are buffer-stored.
  • the SDRAM 1 receives addresses ADDR and control data CONTR from an SDRAM controller 8. Furthermore, the SDRAM 1 and the SDRAM controller 8 receive the clock CKA. This clock is used for reading and writing in the SDRAM 1.
  • the SDRAM controller 8 can also be supplied with a signal SELREF, which is entered manually by the operator and results in the video signals for the respectively supplied image being written to an area 1' ' in the SDRAM 1, while the continuously supplied video signals, or the corresponding data streams, are written to a memory area 1' .
  • SELREF a signal which is entered manually by the operator and results in the video signals for the respectively supplied image being written to an area 1' ' in the SDRAM 1, while the continuously supplied video signals, or the corresponding data streams, are written to a memory area 1' .
  • the SDRAM 1 is followed by a FIFO memory 4, to which data streams read from the SDRAM are written using the clock CKA.
  • a clock CKB is used for reading from the FIFO memory 4. This is part of the studio standard and is not synchronized to the clock CKA.
  • the filling level of the FIFO memory 4 is determined from the two clocks in a further control device 7. If there is a threat of the FIFO memory 4 overflowing or running empty, appropriate information is passed to the SDRAM controller 8, which fills the FIFO memory 4 by reading further data, or initially prevents the reading of further data.
  • a read/write cycle which is illustrated in its entirety in Figure 3 contains a write period WR and read periods READ1 to READ3. Each of these write and read periods is associated with a time period WP or RP, respectively, for preparing for the writing and reading processes, respectively, and with a time period WF and RF, respectively, for terminating the writing and reading processes, respectively.
  • the memory contents of the SDRAM are also refreshed during these time periods.
  • Instruction sequences which are matched to the use of the respective SDRAM module are programmed in the SDRAM controller 8 for the write and read preparation processes WP and RP and for the termination WF and RF of the respective processes.
  • the commands chosen were as follows: P NOPs, PALL, NOPs, REF, ACTV, ACTV, NOPs, WR WRIT, (NOPs) , WF BST, PALL, REF, NOPs, RP NOPs, PALL, NOPs, REF, ACTV, ACTV, NOPs, RD READ, (NOPs) , RF BST, PALL, REF, NOPs.
  • the data streams read from the FIFO memory 4 first of all pass through a further demultiplexer 9, which is followed by a selector 10 whose outputs are connected to a multiplexer 11.
  • the output 12 of the multiplexer 11 carries the video signal which represents parts of both images.
  • the selector 10 is controlled by a selection signal SEL, which is derived by means of a key generator 13 from supplied horizontal- frequency and vertical-frequency synchronization signals, corresponding to the desired split of the image. Details of the operation of the elements 9 to 11 will be explained in more detail in the following text with reference to Figures 4 and 5.
  • the lines a to d in Figure 4 show the data streams which are read from the FIFO memory 4 ( Figure 1) and, in each case with a length of one clock period, contain one pixel MO to M3 of the main image, one pixel R0 to R3 of the reference image, a further pixel M4 to M7 of the main image and a further pixel R4 to R7 of the reference image.
  • clock periods without any new information (hold) are also shown between the clock periods with pixels. It would also be possible to insert further images here, possibly stored in the SDRAM 1, with these images being introduced into the composed image by suitable configuration of the demultiplexer 9, of the selector 10 and of the key generator 13.
  • the lines e to f show gate pulses GMAIN and GREF, by means of which the demultiplexer 9 (Figure 1) is controlled such that only pixels of the main image are produced at the upper four outputs h, i, j, k, and pixels of the reference image are produced at the lower four outputs 1, m, n, o, as is illustrated in the lines annotated by the same letters in Figure 4.
  • These data streams are supplied to the selector 10 ( Figure 1) , which is controlled by the signal SEL shown in line U. This results in the data streams illustrated in the lines q to t in Figure 5.
  • the downstream multiplexer 11 then passes the four pixels MO to M4 of the main image to the output 12 when the signal SEL is in a first state, and passes the four pixels R4 to R7 of the reference image to the output 12 when the signal SEL is in the other state.
  • Figure 6 now shows the complete split image, in which the left-hand part is formed by the main image M, and the right-hand part is formed by the reference image R.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Business, Economics & Management (AREA)
  • Marketing (AREA)
  • Studio Circuits (AREA)

Abstract

L'invention concerne un procédé de production d'une image composée de deux images stockées, des signaux vidéo représentant les deux images étant stockés en mémoire tampon au moyen d'une mémoire vive (SDRAM), des signaux vidéo représentant une première image étant enregistrés dans une première zone de mémoire, et des signaux vidéo représentant au moins une seconde image étant enregistrés dans au moins une seconde zone de mémoire de la mémoire vive. Des signaux vidéo sont lus pixel par pixel, tantôt depuis la première zone de mémoire, tantôt depuis ladite seconde zone de mémoire. Des composantes de signal vidéo de la première image se trouvant dans une première zone d'image et des composantes de signal vidéo de ladite seconde image se trouvant dans une seconde zone d'image sont transmises vers une sortie.
PCT/EP2002/014265 2001-12-28 2002-12-14 Procede de production d'une image composee de deux images stockees WO2003056812A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002356656A AU2002356656A1 (en) 2001-12-28 2002-12-14 Method for producing an image which is composed of two stored images

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10164337A DE10164337A1 (de) 2001-12-28 2001-12-28 Verfahren zum Erzeugen eines aus zwei gespeicherten Bildern zusammengesetzten Bildes
DE10164337.3 2001-12-28

Publications (1)

Publication Number Publication Date
WO2003056812A1 true WO2003056812A1 (fr) 2003-07-10

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PCT/EP2002/014265 WO2003056812A1 (fr) 2001-12-28 2002-12-14 Procede de production d'une image composee de deux images stockees

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AU (1) AU2002356656A1 (fr)
DE (1) DE10164337A1 (fr)
WO (1) WO2003056812A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004073299A1 (fr) * 2003-02-17 2004-08-26 Axis Ab Camera a fonctionnalite panoramique et/ou d'inclinaison verticale
US7525576B2 (en) 2003-02-17 2009-04-28 Axis, Ab Method and apparatus for panning and tilting a camera

Citations (5)

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Publication number Priority date Publication date Assignee Title
US5448315A (en) * 1992-09-15 1995-09-05 Digital Pictures, Inc. System and method of interactively forming and editing digital user-arranged video streams in real-time from a plurality of simultaneously-displayed digital source video streams
US5977946A (en) * 1993-12-16 1999-11-02 Matsushita Electric Industrial Co., Ltd. Multi-window apparatus
US6189064B1 (en) * 1998-11-09 2001-02-13 Broadcom Corporation Graphics display system with unified memory architecture
WO2001052528A1 (fr) * 2000-01-10 2001-07-19 Koninklijke Philips Electronics N.V. Conversion de cadence d'echantillonnage video pour obtention d'effets 3d
US20010035870A1 (en) * 2000-03-10 2001-11-01 Seiko Epson Corporation Nishi-Shinjuku, Japan Overlay of plural images

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4272780A (en) * 1976-06-29 1981-06-09 Teletronics International, Inc. Film scanner with variable rate image enhancement
US5045932A (en) * 1989-06-29 1991-09-03 Eastman Kodak Company Method and apparatus for generating a high definition electronic signal from a line scan of a color original
DE4237982A1 (de) * 1992-11-11 1994-05-19 Philips Patentverwaltung Farbkorrektureinrichtung für hochauflösende digitale Videosignale
US6038034A (en) * 1994-09-19 2000-03-14 Canon Kabushiki Kaisha Image processing apparatus and method therefor

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5448315A (en) * 1992-09-15 1995-09-05 Digital Pictures, Inc. System and method of interactively forming and editing digital user-arranged video streams in real-time from a plurality of simultaneously-displayed digital source video streams
US5977946A (en) * 1993-12-16 1999-11-02 Matsushita Electric Industrial Co., Ltd. Multi-window apparatus
US6189064B1 (en) * 1998-11-09 2001-02-13 Broadcom Corporation Graphics display system with unified memory architecture
WO2001052528A1 (fr) * 2000-01-10 2001-07-19 Koninklijke Philips Electronics N.V. Conversion de cadence d'echantillonnage video pour obtention d'effets 3d
US20010035870A1 (en) * 2000-03-10 2001-11-01 Seiko Epson Corporation Nishi-Shinjuku, Japan Overlay of plural images

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004073299A1 (fr) * 2003-02-17 2004-08-26 Axis Ab Camera a fonctionnalite panoramique et/ou d'inclinaison verticale
US7525576B2 (en) 2003-02-17 2009-04-28 Axis, Ab Method and apparatus for panning and tilting a camera

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Publication number Publication date
DE10164337A1 (de) 2003-07-17
AU2002356656A1 (en) 2003-07-15

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