EP1299796A1 - Affichage a resolution amelioree - Google Patents

Affichage a resolution amelioree

Info

Publication number
EP1299796A1
EP1299796A1 EP01949428A EP01949428A EP1299796A1 EP 1299796 A1 EP1299796 A1 EP 1299796A1 EP 01949428 A EP01949428 A EP 01949428A EP 01949428 A EP01949428 A EP 01949428A EP 1299796 A1 EP1299796 A1 EP 1299796A1
Authority
EP
European Patent Office
Prior art keywords
signal
resolution
format
video
display
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP01949428A
Other languages
German (de)
English (en)
Inventor
Johan Janssen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koninklijke Philips NV
Original Assignee
Koninklijke Philips Electronics NV
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 NV filed Critical Koninklijke Philips Electronics NV
Publication of EP1299796A1 publication Critical patent/EP1299796A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0224—Details of interlacing
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2340/00—Aspects of display data processing
    • G09G2340/04—Changes in size, position or resolution of an image
    • G09G2340/0407—Resolution change, inclusive of the use of different resolutions for different screen areas
    • G09G2340/0414—Vertical resolution change
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/02—Graphics controller able to handle multiple formats, e.g. input or output formats
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2370/00—Aspects of data communication
    • G09G2370/04—Exchange of auxiliary data, i.e. other than image data, between monitor and graphics controller
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/003—Details of a display terminal, the details relating to the control arrangement of the display terminal and to the interfaces thereto
    • G09G5/006—Details of the interface to the display terminal

Definitions

  • the invention relates generally to displaying video images and more particularly to methods and systems for displaying video images with high resolution.
  • Video signals can be transmitted in progressive or interlaced video format.
  • the lines of an image are generally displayed horizontally, one after the other, from the top of the screen to the bottom.
  • the next frame is then displayed, one line at a time, from top to bottom.
  • the frame is the assembly of alternate lines comprising two sequential fields, e.g., lines 1, 3, 5, 7 . . . and then lines 2, 4, 6, 8 . . . .
  • the lines of each field are displayed every 1/60 of a second. Because this occurs so quickly, it appears as one complete picture.
  • FIG. 1 shows the vertical spatial differences between a 480p signal, in the progressive format, and a 480i signal in the interlaced format.
  • successive frames of the 480p signal have identical vertical alignment with the 480 lines of resolution in the vertical direction of successive frames.
  • the 480i signal comprises two fields of a 480 line frame in the interlaced format, in which each field has 240 lines of resolution. However, they are offset and when viewed sequentially, provide the same 480 lines of resolution as the 480p signal.
  • 480p is a known standard picture format.
  • the 704 X 480 pixel progressive (60 frame) version is one of the Digital Television formats.
  • 480i is the NTSC resolution and is also one of the ATSC resolutions.
  • 480 lines of resolution may not be fully satisfactory for certain applications. Although it is possible to increase resolution by increasing the line content of the video signal, such a signal would not be displayed properly with televisions which are constructed to operate with signals in the 48 Op format. It is also desirable to provide video signals in a standard format.
  • 480p is one such standard format.
  • a method and system for providing an enhanced video display is provided.
  • the system and method provide a signal that can be displayed in both a high resolution interlaced format in a high resolution display device and a lower resolution progressive format with a low resolution display device.
  • a signal can be provided in an interlaced 9601 format and be displayed in a display device constructed to receive, process and display video in the 960i format.
  • a display device is only constructed to receive, process and display a video signal in the 480p format, the device will receive the signal at 960i and process and display it as if the signal were in the 48 Op format.
  • Another embodiment of the invention provides an improved method for displaying video signals with high resolution.
  • Another embodiment of the invention provides an improved method and signal for displaying video images which can operate with conventional and enhanced video display devices.
  • Another embodiment of the invention provides an improved system which can operate with conventional and enhanced video signals.
  • the invention accordingly comprises the several steps and the relation of one or more of such steps with respect to each of the others, and the system and signal adapted to effect such steps, or as exemplified in the following detailed description and drawings and the scope of the invention will be indicated in the claims.
  • FIG. 1 shows the vertical spatial differences between a 480p and a 480i video signal
  • FIG. 2 shows the vertical spatial differences between a 480p signal and a 960i signal
  • FIG. 3 is a block diagram showing a system in accordance with the invention
  • FIG. 4 is a block diagram of a video signed being transmitted and encoded in accordance with an embodiment of the invention.
  • FIG. 5 is a block diagram of a signal being decoded and displayed in accordance with an embodiment of the invention.
  • Video signals can be transmitted, received, processed and displayed in the progressive or interlaced format.
  • a progressive scan also called a non-interlaced format
  • the video images are displayed as successive frames.
  • the horizontal lines of pixels are displayed sequentially.
  • lines 1-480 will be displayed in sequence for one frame and then again for the next frame.
  • an interlaced format two half pictures (fields), which together comprise a single frame are displayed sequentially. For example, when a frame is in the interlaced format, the frame can be divided into an odd line (lines 1, 3, 5 . . .) field, followed by an even line (lines 2, 4, 6 . . .) field.
  • a signal which is transmitted in 480i can have the same resolution as a signal transmitted in the 480p format, but requires only one-half of the bandwidth.
  • the bandwidth of a 48 Op signal is used, the vertical resolution of a 960i signal can be provided for the same amount of bandwidth. Referring to FIG. 2, it can be seen that because two fields of a 960i signal each have 480 lines of resolution, twice the resolution can be achieved when the signals are interlaced to form a 960i display in a single frame.
  • Digital television signals are conventionally transmitted in compressed form in accordance with MPEG standards, such as MPEG-2 standards.
  • the signal is then decoded and displayed.
  • An MPEG encoder and/or decoder can still process the signal properly whether it encodes the 480p or 960i format from a spatial resolution point of view.
  • a 960i format video signal is input to an MPEG encoder which is set up with instructions to process the signal as if it were a 480p signal, a signal with enhanced resolution can be provided which will be displayed on a device capable of displaying 960 interlaced lines of resolution as well as one capable of displaying only 480 lines of resolution.
  • a video source 300 which might originate from a broadcaster in a high resolution format, such as 1088i or 720p which are US ATSC standard formats, creates a signal 301 which is transmitted to a signal processor 310 for creating a source video signal 311 in the 960i format. This can be done by de-interlacing, scaling to 960 lines of resolution and then re-interlacing, all in one algorithm.
  • Signal 311 is transmitted to an encoder 320 and can be subjected to various known pre-processing procedures.
  • Encoder 320 codes and compresses signal 311 for transmission, such as in accordance with MPEG-2 as a compressed coded signal 321.
  • the coder can be set to code the signal as if it were in the 480p format.
  • Coded signal 321 can be displayed by a high resolution system 330 which can be constructed to display in the 960i format or to a low resolution system 340 which can be constructed to display video in the 480p format.
  • System 330 includes a decoder 335 which provides a video signal 336 in the 960i format, for example. System 330 can also subject signal 336 to various known postprocessing signal enhancement procedures. System 330 also includes a display 337 which is constructed to receive signal 336 and display signal 336 in the 960i format, for example.
  • Coded signal 321 is also compatible with system 340 which can be constructed to display video in the 480p format.
  • System 340 includes a decoder 345 which receives and decodes signal 321 and transmits a signal 346 to a display 347 in the 480p format, for example.
  • Display 347 can be constructed to display video signal 346 in the 480p format.
  • an add-on such as a Digital Video Recorder (DVR) which incorporates transcoding (going from a high picture resolution bit rate to another) can be coupled to a high resolution television.
  • the television or DVR can be constructed to recognize the 480p signal as actually containing sufficient vertical resolution information to be capable of display in the 960i format and can adjust post processing to yield twice the vertical resolution as the 480p format. This can be done by embedding instructions in portions of the coded signal or with mechanical or electrical switches which, for example, can recognize a DVD as a type coded as 480p, but with 960i resolution display capabilities.
  • the invention can also be directed to MPEG and other decoders with specialized pre and post processing units to insure that the high resolution interlaced signal transmitted as a progressive signal at half the resolution is displayed with high resolution.
  • a signal 410 which in this example is a 1080i or 720p signal generated by a broadcaster, is to be stored in a storage device with a fixed capacity with high definition (HD) recording capabilities, such as a DVD, as a 480p signal.
  • HD high definition
  • the device can record 2 hours of HD (1080i or 720p) information.
  • LP Long Play
  • this mode of recording the transmission permits twice the record time (4 hours) of the transparent mode.
  • a DVD which can function in both 960i capable systems or 480p systems may be desired.
  • transcoding In order to double the recording capacity of the DVD, it is necessary to reduce the bit rate of the MPEG encoded incoming signal. This is referred to as transcoding. It is also desirable to change the format. However, the resulting format should be compliant with a standard, such as ATSC. A standard 480p format permits encoding at a slower bit rate, but can lead to reduced picture quality. Nevertheless, it is desirable to make the DVD compatible with 480p systems because not all users will have 960i systems.
  • a recording system 400 can be used to record signal 410 in a storage device such as a DVD which can be played back with either a high resolution display or a low resolution display.
  • signal 410 is decoded with an MPEG decoder 420, which generates a decoded signal 421.
  • Signal 421 is then scaled to be displayed as a series of 720 X 960i frame images, with each frame comprising two 720 X 480 fields. Thereafter, the signal is packed 440 and encoded 441 in accordance with an MPEG standard as if the signal was a 720 X 480p signal.
  • the signal processor can be constructed to code in this manner.
  • this coding can embed meta level data to indicate that this is a signal that can be displayed as 720 X 960i frames, composed of interlaced 720 X 480 fields.
  • This code can be incorporated into the header or in other known manners.
  • the signal is encoded at the lower bit rate. Accordingly, a signal 499 can be output and sent to a display device or stored in a storage medium, such as a DVD. This signal can be decoded and displayed at either 480p or 960i.
  • a display system 500 shown in FIG.
  • a signal 499' can come from a storage medium such as a DVD that was encoded as set forth above with reference to FIG 4.
  • Display system 500 will know (as . discussed herein) that the signal can be displayed in the 960i format.
  • decoder 510 the signal is MPEG decoded. Decoding at this stage is the same decoding as if the signal were an ordinary 480p signal.
  • a repacker 520 the signal is repacked as a series of 720 X 960i frames.
  • a 720 X 960i signal 530 can then be subjected to various post processing techniques, such as signal peaking, in a postprocessor 540 and then sent to a display 550.
  • System 500 can be incorporated into a TV or can be an add on, such as a DVD player.
  • System 500 can be "told" that MPEG stream 499' is in fact a 960i signal and not a 480p signal, as the signal header states. This can be accomplished in various known ways. For example, meta data can be incorporated in reserved portions of the MPEG stream, such as the header. VCRs and TVs, such as those currently sold by Philips Electronics, can be "told” that the 480p stream is really a 960i stream when connected with a scart cable which permits the transmitter and display to identify and communicate with each other through an additional data transmission line. DVDs or other media which store data encoded as in FIG.
  • the display 4 can be provided with physical structures, such as holes or tabs or optical or magnetically readable information to instruct the display to convert the "480p" signal to a 960i signal. If the devices cannot communicate, or if the display system cannot process a 960i signal, the display system will not know the true nature of the signal it is receiving and will assume that it is a 480p signal as indicated by the signal header and display the signal in the 480p format at reduced resolution.
  • a signal with enhanced resolution can be provided which is also compatible with display devices constructed to display at the lower resolution progressive format.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Graphics (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Television Systems (AREA)

Abstract

L'invention concerne un procédé et un système pour améliorer une visualisation vidéo. Le signal vidéo peut être affiché (960i) avec deux fois la résolution du format standard (480p), dans un format entrelacé, qui peut être affiché au niveau de résolution élevée dans un dispositif (337) prévu pour afficher le niveau de résolution élevée et peut être encore affiché correctement dans un dispositif prévu pour recevoir et visualiser le format standard de la moitié de la résolution. Ainsi, un signal peut être fourni dans un format 960i entrelacé et peut être affiché dans un dispositif d'affichage prévu pour recevoir, traiter et afficher le signal vidéo dans le format 960i. Toutefois, si un dispositif (340) est construit uniquement pour recevoir, traiter et afficher un signal vidéo dans un format progressif (480p), le dispositif va le traiter (345) et l'afficher (347) comme si ce signal était dans le format progressif (480p).
EP01949428A 2000-06-29 2001-06-20 Affichage a resolution amelioree Withdrawn EP1299796A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US606395 1990-10-31
US60639500A 2000-06-29 2000-06-29
PCT/EP2001/007077 WO2002001341A1 (fr) 2000-06-29 2001-06-20 Affichage a resolution amelioree

Publications (1)

Publication Number Publication Date
EP1299796A1 true EP1299796A1 (fr) 2003-04-09

Family

ID=24427788

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01949428A Withdrawn EP1299796A1 (fr) 2000-06-29 2001-06-20 Affichage a resolution amelioree

Country Status (4)

Country Link
EP (1) EP1299796A1 (fr)
KR (1) KR100746845B1 (fr)
CN (1) CN1255719C (fr)
WO (1) WO2002001341A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4789494B2 (ja) 2004-05-19 2011-10-12 株式会社ソニー・コンピュータエンタテインメント 画像フレーム処理方法、装置、レンダリングプロセッサおよび動画像表示方法
KR100759224B1 (ko) * 2005-12-14 2007-09-17 주식회사 대우일렉트로닉스 디스플레이 장치의 영상 표시방법

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06153069A (ja) * 1992-10-30 1994-05-31 Sony Corp 画像の変換装置、複製装置、再生装置、および表示装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0201341A1 *

Also Published As

Publication number Publication date
CN1255719C (zh) 2006-05-10
KR20020032560A (ko) 2002-05-03
CN1383504A (zh) 2002-12-04
WO2002001341A1 (fr) 2002-01-03
KR100746845B1 (ko) 2007-08-09

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