EP1745638A1 - Method and arrangement for transmitting images in a network - Google Patents

Method and arrangement for transmitting images in a network

Info

Publication number
EP1745638A1
EP1745638A1 EP20050742901 EP05742901A EP1745638A1 EP 1745638 A1 EP1745638 A1 EP 1745638A1 EP 20050742901 EP20050742901 EP 20050742901 EP 05742901 A EP05742901 A EP 05742901A EP 1745638 A1 EP1745638 A1 EP 1745638A1
Authority
EP
European Patent Office
Prior art keywords
image
data unit
network
sector
characterized
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Withdrawn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
EP20050742901
Other languages
German (de)
French (fr)
Inventor
Diana Filimon
Stefan Heiss
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.)
Fujitsu Technology Solutions GmbH
Original Assignee
Fujitsu Technology Solutions 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
Priority to DE102004023300 priority Critical
Application filed by Fujitsu Technology Solutions GmbH filed Critical Fujitsu Technology Solutions GmbH
Priority to PCT/DE2005/000650 priority patent/WO2005112422A1/en
Publication of EP1745638A1 publication Critical patent/EP1745638A1/en
Application status is Withdrawn legal-status Critical

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/00127Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture
    • H04N1/00204Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture with a digital computer or a digital computer system, e.g. an internet server
    • H04N1/00209Transmitting or receiving image data, e.g. facsimile data, via a computer, e.g. using e-mail, a computer network, the internet, I-fax
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/32Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device
    • H04N1/32609Fault detection or counter-measures, e.g. original mis-positioned, shortage of paper
    • H04N1/32625Fault detection
    • H04N1/32641Fault detection of transmission or transmitted data, e.g. interruption or wrong number of pages
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/32Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device
    • H04N2201/3201Display, printing, storage or transmission of additional information, e.g. ID code, date and time or title
    • H04N2201/3225Display, printing, storage or transmission of additional information, e.g. ID code, date and time or title of data relating to an image, a page or a document
    • H04N2201/3242Display, printing, storage or transmission of additional information, e.g. ID code, date and time or title of data relating to an image, a page or a document of processing required or performed, e.g. for reproduction or before recording

Abstract

The invention relates to a method for sending an image (11) and a method for receiving and representing an image (31) in a network (7). Said methods are characterised in that the image (11) is decomposed into at least two sectors (12) before the emission thereof, and a data unit (13) is produced for each sector (12), said data unit containing the image content of the corresponding sector (12) in an encoded form, and information on the relative position of the corresponding sector (12) inside the image (11). Inversely, corresponding sectors (32) are combined on the basis of received data units (33) in order to form an image (31). The invention enables the consequences of transmission errors, especially in wireless networks, to be minimised.

Description

description

Method and arrangement for transfer of images within a network

The invention relates to a method for sending an image within a network and a method for receiving and displaying an image, which has been sent within a network. The invention further relates to the use of the method as well as an arrangement for transmitting an image and for receiving and displaying an image.

A possible basic concept for computer networks is the peer-to-peer architecture in which all members of the network have equal rights. The peer-to-peer architecture is also suitable for spontaneously built (ad hoc) networks that are based on wireless transmission technology, such as Bluetooth o- of the WLAN (Wireless Local Area Network). The peer-to-peer architecture is flexible to deal with the appropriate effort in network management is able to newly added or cut correspond members and does not require predefined basic network structure.

When data is to be exchanged within the network that are to be reached all the members, such as the so-called multicast or broadcast technology, a network protocol without feedback on the data retention offers to keep communication costs low. The system requires such a network protocol allows for transmission errors. In wireless networks, which are prone to interference with other punk waves or by Reflekti- on its own signal, or by absorption due to interference, this can be problematic. For example, if images are transferred in a presentation within the network, incorrectly transmitted data can lead to too much image information is lost to make the content understandable.

One way to reduce the likelihood that too much image information is lost, to minimize the redundant sending the image data. Another option is to provide the image data with error correction information. Both lead to a larger volume of data in transmission, what with low transmission bandwidth leads especially in wireless networks to long transfer times. Furthermore, error correction, given the relatively low processing power of portable computers (laptops, Pocket PCs), which often are used in ad hoc networks to computationally intensive.

It is therefore an object of the invention to describe a method and an arrangement for transmitting and receiving and displaying images in which the effect of transmission errors can be minimized without redundancy of the data and without correction method.

The object is solved with the features of claims 1 and 5, which relates to the method and with the features of claims 9 and 10, which relates to the arrangement.

The manner in which image information is in units of data encoded, usually involves that an error within the data unit affecting the entire subsequent image information stored. The invention minimizes the impact of an error on the entire picture content characterized in that the image is divided into sectors shipped separately, are received and displayed. An error thus affects a smaller unit of information, and thus the resultant by the error disturbance is reduced throughout the image. By positioning information, the remaining sectors are correctly positioned even with missing sectors.

Further details and embodiments of the invention are specified in the subclaims.

The invention is explained in more detail below with reference to two drawings. In the drawings:

1 shows an embodiment of the arrangement according to the invention for sending an image, and

2 shows an embodiment of the arrangement according to the invention for receiving and displaying an image.

1 shows a first computer 1 is shown as an exemplary embodiment of an arrangement for sending an image. The first computer 1 includes a first screen 2, means for extracting the image information 3, a data compressor 4, a means for decomposing into packets 5 and transmitting means 6, on the first computer 1 is connected to a network. 7 an image 11 is reproduced by the first screen 2, which has a sector 12th Furthermore, a data unit 13, a compressed data unit 14, and packets 15 are shown to illustrate the process carried out.

To send an image 11 displayed on the first screen 2, this image is divided into sectors 12. 11 In the illustrated example, the image 11 is divided into horizontal stripes, with each other, the image completely fills 11 distribution is also conceivable. The sectors 12, of which only one is exemplified here are successively processed. They are first supplied to the means for extracting the image information 3, which created the data unit 13 according to a predetermined encoding rule from the image information of the sector 12th The data unit 13 is then supplied to the data compressor 4, creates the compressed data unit fourteenth Advantageously, the data compressor is 4 Method for run-length encoding (RLE, Run Length Encoding), which offer a high degree of compression for compressing images. Known compression methods such as JPEG (Joint Picture Experts Group) or data formats such as TIFF (Tagged Interleaved File Format) or PNG (Portable Network Graphics) can be applied here. It is also possible that means for extracting the image information 3 and the data compressor 4 to be run by a unit. The data unit 13 and / or the compressed data unit 14 can be stored in a nonvolatile memory both in the computer 1 as well as for temporary storage in the form of data. Both the data unit 13 and the compressed data unit 14 in addition to the image information as additional information 11. In addition, the size (height, width) can be specified in the sector 12, if these are not implicitly the relative position of the sector 12 within the image from the encoding rule for the image information is obtained.

The thus prepared compressed data unit 14 is then supplied to the means for disassembling the packets. 5 The contents of the compressed data unit 14 is divided into a series of packets 15, wherein the size of the packages 15 according to the used network protocol addresses. In addition, each packet is provided with the name of the compressed data unit 14 and a consecutive number 15th The packages 15 are sent subsequently by the transmitter device 6 sequentially in the network. 7 A network protocol that allows the sending of data packets without the prior establishment of a connection with receiving protocol (handshake), such as UDP (User Datagram Protocol), which is based on the IP (Internet Protocol).

2 shows an embodiment of an arrangement for receiving and displaying an image is shown. A second computer 21 is also connected to the network. 7 The second computer 21 has a second screen 22, means for representing the data unit 23, a data decompressor 24, a means for assembling packages 25 and a receiving device 26th On the second screen 22 an image 31 is shown, which consists of several sectors 32nd To illustrate the inventive method for receiving and displaying an image of a data unit 33, a compressed data unit 34, and packets 35 are further shown.

received by the receiving device 26 data into packets 35 are assembled from the network. 7 As a result of the non-error-correcting and not reception-transmission protocol can lead to erroneous data packets 35, as is shown symbolically for a data packet in FIG. 2 The data packets 35 are fed to the means for assembling packages 25 which assembles the packets 35 to the compressed data unit 34th On the basis of the additional information on the name of the compressed data unit and the sequence number, the packets 35 can be assigned to a compressed data unit 34 clearly. Based on the serial number can also be determined whether data packets 35 have been lost in transit. Some transmission protocols also provide the ability to transmit a checksum by which the integrity of the data of a packet 35 can be checked. Lost or corrupted data packets 35 can now be considered in different ways by the means for assembling packages 25th It is for example possible to replace a faulty data packet by a predetermined data packet with, however, no image information, but to ensure that the error does not propagate in the picture content of the following packages 35th

The compressed data unit 34 is then converted by the data decompressor 24 in the non-compressed data unit 33 which is supplied to the means for displaying the image information 23rd This removes the data unit 33, the additional information on the position and optionally the size of the sector 32 within the image 31 and provides the sector 32 at the specified location is.

In the illustrated example, a coding method was used in which the image information line by line from the upper left point of a sector in the data unit 33 are included. In the best case, an error results in a package 35 only to the incorrect display of the image information contained in this package 35th In the worst case, the image information subsequent packets 35 is affected. In any case, by the Invention emäße method, the effect of the error is limited to the one sector 32nd The data decompressor 24 and the means for representing the image information 23 may alternatively be quantitative construed as a unit together. Just as in the embodiment of Figure 1, the compressed data unit also provides an opportunity, 34 and / or the data unit 33 either store them in the memory of the second computer 21 or either schenzuspeichern intermediate in the form of a file on a non-volatile storage medium or for further later processing store.

Reference oak list

1 first computer

2, first screen

3 means for extracting image information

4 data compressor

5 means for decomposing packages

6 transmitter

7 network

11, 31 image

12, 32 sector

13, 33 Data Unit

1, 34 compressed data unit

15, 35 packets

21 second computer

22, second screen

23 means for displaying image information

24 data decompressor

25 device for assembling packages

26 receiver

Claims

claims
1. A method for sending an image (11) within a network (7), characterized in that - the image (11) is divided into at least two sectors (12), - for each sector (12) generates a data unit (13) is that contains the image content of the corresponding sector (12) in coded form, - each data unit (13) information on the relative position of the corresponding sector (12) within the image (11) is added, and - the data units (13) are made ,
2. The method according to claim 1, characterized in that the data units (13) are compressed before sending.
3. A method according to any one of claims 1 or 2, characterized in that the data units (13) are files.
4. The method of claim 1 to 3, characterized in that the data units (13) prior to transmission in a plurality of packets (15) are divided and the packets (15) as additional information, the name of the respective data unit (13) and a consecutive number will be added.
, A method for receiving and displaying an image (31), which was sent according to any one of claims 1 to 3 within a network (7), characterized in that - receiving at least one data unit (33), - the (in the at least one data unit 33) coded image content of a sector (32) contained is extracted and this sector (32) is represented on the basis of information on the relative position (in its position within the image 31).
6. The method according to claim 5, characterized in that packets are received in accordance with claim 4, and the at least one data unit (33) from the received packets (35) is assembled in the order of their serial number.
7. A method according to any one of claims 5 or 6, characterized in that the data units (33) are files.
8. Application of the process according to one of claims 1 to 7 within a Wi-Fi based network (7), which uses a multicast and / or broadcast technology.
9. An arrangement for sending an image (11) within a network (7), which is adapted to perform the method according to any one of claims 1 to. 4
5 perform 0. arrangement for receiving and displaying an image (31), which has been sent within a network (7), which is adapted to perform the method according to any one of claims. 7
EP20050742901 2004-05-11 2005-04-12 Method and arrangement for transmitting images in a network Withdrawn EP1745638A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE102004023300 2004-05-11
PCT/DE2005/000650 WO2005112422A1 (en) 2004-05-11 2005-04-12 Method and arrangement for transmitting images in a network

Publications (1)

Publication Number Publication Date
EP1745638A1 true EP1745638A1 (en) 2007-01-24

Family

ID=34968143

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20050742901 Withdrawn EP1745638A1 (en) 2004-05-11 2005-04-12 Method and arrangement for transmitting images in a network

Country Status (2)

Country Link
EP (1) EP1745638A1 (en)
WO (1) WO2005112422A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7555291B2 (en) 2005-08-26 2009-06-30 Sony Ericsson Mobile Communications Ab Mobile wireless communication terminals, systems, methods, and computer program products for providing a song play list
US8914070B2 (en) 2005-08-31 2014-12-16 Thomson Licensing Mobile wireless communication terminals, systems and methods for providing a slideshow
US20070047505A1 (en) * 2005-08-31 2007-03-01 Sony Ericsson Mobile Communications Ab Mobile wireless communication terminals, systems and methods for providing a slideshow
US7546144B2 (en) 2006-05-16 2009-06-09 Sony Ericsson Mobile Communications Ab Mobile wireless communication terminals, systems, methods, and computer program products for managing playback of song files
US7925244B2 (en) 2006-05-30 2011-04-12 Sony Ericsson Mobile Communications Ab Mobile wireless communication terminals, systems, methods, and computer program products for publishing, sharing and accessing media files
US7991268B2 (en) 2006-08-18 2011-08-02 Sony Ericsson Mobile Communications Ab Wireless communication terminals, systems, methods, and computer program products for media file playback
JP5163233B2 (en) * 2008-03-31 2013-03-13 富士通株式会社 Information processing apparatus, program, method, processing circuit, and communication system

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5917962A (en) * 1995-06-06 1999-06-29 Apple Computer, Inc. Method and apparatus for partitioning an image
JP2003152544A (en) * 2001-11-12 2003-05-23 Sony Corp Data communication system, data transmitter, data receiver, data-receiving method and computer program

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2005112422A1 *

Also Published As

Publication number Publication date
WO2005112422A1 (en) 2005-11-24

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