WO1991007049A1 - Procede pour la reproduction progressive d'images avec une frequence d'image accrue - Google Patents

Procede pour la reproduction progressive d'images avec une frequence d'image accrue Download PDF

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Publication number
WO1991007049A1
WO1991007049A1 PCT/EP1990/001777 EP9001777W WO9107049A1 WO 1991007049 A1 WO1991007049 A1 WO 1991007049A1 EP 9001777 W EP9001777 W EP 9001777W WO 9107049 A1 WO9107049 A1 WO 9107049A1
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WO
WIPO (PCT)
Prior art keywords
image
receiver
format
additional information
images
Prior art date
Application number
PCT/EP1990/001777
Other languages
German (de)
English (en)
Inventor
Erich Geiger
Dietrich Westerkamp
Original Assignee
Deutsche Thomson-Brandt 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 Deutsche Thomson-Brandt Gmbh filed Critical Deutsche Thomson-Brandt Gmbh
Publication of WO1991007049A1 publication Critical patent/WO1991007049A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N11/00—Colour television systems
    • H04N11/06—Transmission systems characterised by the manner in which the individual colour picture signal components are combined
    • H04N11/12—Transmission systems characterised by the manner in which the individual colour picture signal components are combined using simultaneous signals only
    • H04N11/14—Transmission systems characterised by the manner in which the individual colour picture signal components are combined using simultaneous signals only in which one signal, modulated in phase and amplitude, conveys colour information and a second signal conveys brightness information, e.g. NTSC-system
    • H04N11/16—Transmission systems characterised by the manner in which the individual colour picture signal components are combined using simultaneous signals only in which one signal, modulated in phase and amplitude, conveys colour information and a second signal conveys brightness information, e.g. NTSC-system the chrominance signal alternating in phase, e.g. PAL-system
    • H04N11/167—Transmission systems characterised by the manner in which the individual colour picture signal components are combined using simultaneous signals only in which one signal, modulated in phase and amplitude, conveys colour information and a second signal conveys brightness information, e.g. NTSC-system the chrominance signal alternating in phase, e.g. PAL-system a resolution-increasing signal being multiplexed to the PAL-system signal, e.g. PAL-PLUS-system
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/007—Systems with supplementary picture signal insertion during a portion of the active part of a television signal, e.g. during top and bottom lines in a HDTV letter-box system
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/01—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level
    • H04N7/0117—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level involving conversion of the spatial resolution of the incoming video signal
    • H04N7/012—Conversion between an interlaced and a progressive signal

Definitions

  • the invention relates to a method for the progressive reproduction of images with an increased frame rate.
  • the active picture in the 4: 3 receiver then comprises 432 lines len and the margins 72 lines each.
  • This type of presentation of, for example, feature films with a 16: 9 format in a 4: 3 receiver has also been common up to now and does not require the viewer to get used to it.
  • the geometry distortion is compensated for by removing the lines.
  • the 16: 9 receiver now evaluates the information from the two marginal strips and increases the number of active lines reduced to 432 to 576 again, thus generating a 16: 9 picture that fills the format.
  • DE 3930964 describes a television transmission system in which additional information is also transmitted, with the aid of which the 15: 9 receiver can display the 432 active lines in progressive form to fill the format. But due to the relatively low image change frequency of 50 Hz, large area flickering can occur, especially with higher image brightness.
  • the invention has for its object to improve a 16: 9 receiver for images transmitted in the 'letter box' method with 16: 9 format and 432 active lines so that the 50 Hz large-area flicker is eliminated.
  • a progressive television signal in 16: 9 format with, for example, 576 active lines is digitized on the transmitter side, then in the vertical direction to 432 lines transcoded, converted into an interlaced signal, provided with additional information and transmitted as a compatible television signal in the well-known 4: 3 format.
  • the additional information i can e.g. consist of signal components that make it possible to generate a progressive signal with 432 active lines from the interlace signal with 432 active lines.
  • a corresponding receiver then delivers a progressive, format-filling 16: 9 picture with 432 active lines and 50 Hz frame rate.
  • the progressive 16: 9 receiver with 468.75 lines also has a line frequency of 31.25 KHz. If the frame rate of 50 Hz were maintained, the vertical blanking interval would be significantly increased.
  • an image has a duration of 20 ms, i.e. three images are displayed in 60 ms.
  • a fourth no 4 must be generated after every three reproduced pictures no 1 , no 2 , no 3 . This is preferably done in a motion-adaptive manner.
  • the third received image ni 3 is simply reproduced as the fourth playback image no 4 .
  • pictures no 1 , no 2 , no 3 for example, the pictures ni 1 , ni 2 , ni 3 are reproduced.
  • image points for image no 4 result from the arithmetic mean of corresponding temporally different but spatially identical image incunts from image ni 3 and image ni 4
  • Picture no 5 results from picture ni 4 etc. Picture no 1 results from picture ni 1
  • Image no 2 results from a motion compensated
  • Picture no 5 results from picture ni 4 etc. all playback pictures no 1 , no 2 , ... each result from a motion-compensated interpolation from two or more corresponding sent pictures ni 1 , ni 2 , ....
  • the information as to whether the image content is static or dynamic can e.g. be contained in the transmitted additional information.
  • FIG. 1 A progressive source signal in the format 16: 9 2 the image from FIG. 1 with the vertically compressed active part and additional information in the two edge parts (known)
  • FIG. 5 block diagram of a receiver according to the invention
  • Fig. 1 shows a progressively scanned television picture in 16: 9 picture format, as it is generated in a 16: 9 studio, with a circle.
  • FIG. 2 shows how the television picture from FIG. 1 is compressed vertically in a known 16: 9 coder in the active area 20. From the 576 active lines in FIG. 1, 432 lines are generated by vertical compression by a factor of 4/3 as an active image part 20 for a 4: 3 receiver. This compression takes place by removing every fourth line from the image from FIG. 1 or by vertical interpolation.
  • the geometry of the circle has changed due to the compression.
  • the lines removed from the active image part 20 or for the decoding in the 16: 9 receiver are transmitted in the two edge strips 21, 22 as an additional signal.
  • FIG. 3 shows that a 4: 3 receiver reproduces the active part 20 of the image from FIG. 2 in the active region 30. Due to the horizontal compression of the 16: 9 format in the 4: 3 format by a factor of 4/3 has restored the original geometry of the circle from FIG. 1. An observer has the full image content from FIG. 1 available, but with reduced vertical resolution and with black stripes 31, 32 at the top and bottom of the image. For television systems with other line numbers, the numbers change accordingly. For a television system with 525 lines or 481 active lines, for example, the border strips 21 and 22 can each contain sixty lines and the active area 20 361 lines filled with picture content.
  • the frames 411 to 416 in FIG. 4a each take a period of 20 ms and correspond to frames such as those provided by a receiver according to DE 3930964 (432 active lines, 50 Hz alternating frequency, progressive).
  • the pictures 411 to 414 correspond to the sent pictures ni 1 to ni 4
  • the pictures 415 and 416 correspond to the sent
  • frames 421 to 428 which, for example, are generated from one or more of the frames 411 to 416 and each take 15 ms. These pictures are also progressive and have 432 active lines, but the frame rate is 66 2/3 Hz. Pictures 421 to 425 correspond to the playback pictures no to no 5 , pictures 426 to 428 correspond to playback pictures no 6 to no 8 . Due to the increased frame rate to 66 2/3 Hz, there is practically no longer any flickering.
  • Images 421 to 428 are generated in a motion-adaptive manner, as described above.
  • image 411 is reproduced as image 421, image 412 as image 422, image 413 as image 423 and image 424, Picture 414 as picture 425, picture 415 as picture 426, picture 416 as picture 427 and picture 428.
  • Fig. 411 is reproduced as Fig. 421, Fig. 412 as Fig. 422, Fig. 413 as Fig. 423, Fig. 424 is reproduced pixel by pixel as an arithmetic mean from corresponding pixels from Fig. 413 and Fig. 414, Fig. 414 is reproduced as Fig. 425, Fig. 415 as Fig. 426 , Image 416 as image 427 and image 428 pixel by pixel as the arithmetic mean of the corresponding pixels from image 416 and the image received after image 416.
  • FIG. 5 shows a block diagram of a receiver which, on its display 57 according to FIG. 4a, displays images received with the antenna 51 as images of increased image change frequency according to FIG. 4b.
  • the antenna signals can also e.g. signals fed via cable. These signals are fed to an input circuit 52 which e.g. contains a tuner, an IF demodulator and an A / D converter and is connected to a downstream letter box decoder 53 which also contains an additional information separator.
  • the additional information separated in the 'letter box' decoder 53 is fed to an additional information decoder 58, in which e.g. an additional signal is obtained with which an image signal with 432 lines and a progressive representation is recovered from the 432 active lines in interlace format received in a compatible manner from the 'letter box' decoder 53 in the interlace progressive converter 54.
  • Its output signal with a frame rate of 50 Hz is forwarded to a memory circuit 55, from which it is read out after a corresponding processing with an increased frame rate of 66 2/3 Hz and fed to an output circuit 56.
  • the output circuit 56 contains, for example, a D / A converter and the control for the display 57.
  • the image signal is fed from the memory circuit 55 to an interpolator 59 which, according to the description for FIG. 4, generates intermediate images in a motion-adaptive manner and returns them to the memory circuit 55.
  • the interpolator receives the static / moving information, for example from the additional information decoder 58.
  • the receiver can, as described analogously for FIG. 4, reproduce correspondingly motion-adaptively interpolated pictures with 394 lines or 361 active lines and 80 Hz frame rate and 31.5 kHz line frequency .

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Computer Graphics (AREA)
  • Television Systems (AREA)

Abstract

Dans un système de transmission de télévision qui fonctionne selon le principe de la ''boîte aux lettres'' pour le format d'images 16:9, chaque quatrième ligne est éliminée et transférée à titre d'informations supplémentaires aux bords supérieur et inférieur de l'image sous une forme compatible avec le format 4:3. Des images progressives avec 432 lignes actives et une fréquence d'images de 50 Hz sont obtenues par un traitement supplémentaire du signal dans l'émetteur et le récepteur 16:9. Néanmoins, cette fréquence d'images relativement basse peut donner lieu à un papillotement étendu. La fréquence d'images est portée à 66 2/3 Hz et le papillotement étendu est éliminé à une fréquence de lignes constante de 31,25 kHz par une interpolation, adaptative en fonction du mouvement, de quatre images à reproduire à partir de trois images reçues dans le récepteur 16:9.
PCT/EP1990/001777 1989-10-28 1990-10-19 Procede pour la reproduction progressive d'images avec une frequence d'image accrue WO1991007049A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19893935981 DE3935981A1 (de) 1989-10-28 1989-10-28 Verfahren zur progressiven wiedergabe von bildern mit erhoehter bildwechselfrequenz
DEP3935981.6 1989-10-28

Publications (1)

Publication Number Publication Date
WO1991007049A1 true WO1991007049A1 (fr) 1991-05-16

Family

ID=6392448

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1990/001777 WO1991007049A1 (fr) 1989-10-28 1990-10-19 Procede pour la reproduction progressive d'images avec une frequence d'image accrue

Country Status (5)

Country Link
CN (1) CN1051472A (fr)
AU (1) AU6636590A (fr)
DE (1) DE3935981A1 (fr)
TR (1) TR24738A (fr)
WO (1) WO1991007049A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1052608C (zh) * 1993-07-24 2000-05-17 电子科技大学 一种数字式高清晰度电视传输方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3840054C1 (fr) * 1988-11-28 1989-09-07 Institut Fuer Rundfunktechnik Gmbh, 8000 Muenchen, De
DE3843423C1 (en) * 1988-12-23 1989-09-14 Institut Fuer Rundfunktechnik Gmbh, 8000 Muenchen, De Compatible television transmission system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3840054C1 (fr) * 1988-11-28 1989-09-07 Institut Fuer Rundfunktechnik Gmbh, 8000 Muenchen, De
DE3843423C1 (en) * 1988-12-23 1989-09-14 Institut Fuer Rundfunktechnik Gmbh, 8000 Muenchen, De Compatible television transmission system

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
Fernseh & Kino Technik, Band 41, Nr. 11, November 1987, (Heidelberg, DE), U. Messersmid: "Fernsehempf{nger der 90er Jahre", Seiten 501-503 *
IEEE Transactions on Consumer Electronics, Band 35, Nr. 3, August 1989, IEEE (New York, US) Y. Kanatsugu et al.: "Development of muse family systems", Seiten 153-158 *

Also Published As

Publication number Publication date
AU6636590A (en) 1991-05-31
TR24738A (tr) 1992-03-01
CN1051472A (zh) 1991-05-15
DE3935981A1 (de) 1991-05-02

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