Image transmission system

• US 5,809,231 A
• Filed: 03/18/1996
• Issued: 09/15/1998
• Est. Priority Date: 11/07/1994
• Status: Expired due to Fees

• Current Assignee: Kokusai Electric Co., Ltd.
• Original Assignee: Kokusai Electric Co., Ltd.
• Inventors: Yokoyama, Naoki, Oyamada, Ouichi
• Primary Examiner(s): Trammell, James P.
• Assistant Examiner(s): Bui, Bryan
• Application Number:
  US08/617,423
• Time in Patent Office: 911 Days
• Field of Search: 395/200.03, 395/200.3, 395/200.77, 364/514 R, 364/514 A, 371/2.1, 371/30, 371/35, 371/37.1, 371/38.1, 371/39.1, 358/404, 358/405, 358/433, 358/434, 358/135-138, 358/449, 358/459, 358/462, 358/467, 348/416-616, 348/421, 348/469, 348/390
• US Class Current: 709/200
• CPC Class Codes: H04N 19/895 in combination with error concealment

Abstract

An image transmission system and method for transmitting an image, which has been divided into a plurality of pixel blocks, comprising a transmitting device and a receiving device. The transmitting device includes an information source encoder for dividing an image to be transmitted into a plurality of pixel blocks in an original arrangement, a pixel block dispersing unit for arranging the pixel blocks of the image according to predetermined rules, and a modulator for successively modulating and transmitting the rearranged blocks. The receiving device includes a demodulator for successively receiving and demodulating the blocks transmitted from the modulator, a pixel block rearranging unit for rearranging the received blocks of the image back into the original arrangement according to the predetermined rules, an information source decoder for decoding the pixel blocks, and a pixel data interpolator for interpolating any block which has suffered a transmission error based on blocks adjacent thereto in the original arrangement. Since any block which has suffered a transmission error is interpolated using normal blocks, the original image can be reproduced with high quality by the receiving device.

Claims

1. An image transmission system for transmitting an image, said image transmission system comprising:

a transmitting device comprising;

a dividing means for dividing the image into a plurality of blocks so as to obtain an original arrangement of blocks;

a dispersing means for dispersing the plurality of blocks based upon predetermined rules so as to obtain a dispersed arrangement of blocks; and

a transmitting means for transmitting the plurality of blocks, as arranged in the dispersed arrangement of blocks, in a successive manner; and

a receiving device comprising;

a receiving means for receiving the plurality of blocks, transmitted by said transmitting means, in a successive manner;

a rearranging means for rearranging the plurality of blocks received by said receiving means based upon said predetermined rules so as to obtain the original arrangement of blocks; and

an interpolating means for interpolating any of the plurality of blocks received by said receiving means, which have experienced transmission errors, based upon blocks adjacent thereto in the original arrangement of blocks.

2. An image transmission system as claimed in claim 1, wherein said transmitting means further comprises image input means for inputting the image and said receiving device further comprises image output means for reproducing and outputting the image based upon the original arrangement of blocks obtained by said rearranging means and based upon the blocks interpolated by said interpolating means.

3. An image transmission system as claimed in claim 2, wherein said image input means comprises a video camera and said image output means comprises an image display unit.

4. An image transmission system as claimed in claim 1, wherein the original arrangement of blocks and the dispersed arrangement of blocks are each in the form of a matrix and wherein said predetermined rules comprise the selection of blocks in a downward and successive manner along every other column and every other row of the matrix.

5. An image transmission system as claimed in claim 1, wherein said transmitting device further comprises a first rule table and said receiving device further comprises a second rule table, and wherein said predetermined rules are stored in said first rule table and said second rule table.

6. An image transmission system for transmitting an image, said image transmission system comprising:

a transmitting device comprising;

a dividing means for dividing the image into a plurality of blocks so as to obtain an original arrangement of blocks and for assigning a block number to each of the plurality of blocks so as to identify a location of each of the plurality of blocks in the original arrangement of blocks;

a dispersing means for dispersing the plurality of blocks based upon predetermined rules so as to obtain a dispersed arrangement of blocks; and

a transmitting means for transmitting the plurality of blocks, as arranged in the dispersed arrangement of blocks, in a successive manner; and

a receiving device comprising;

a receiving means for receiving the plurality of blocks, transmitted by said transmitting means, in a successive manner;

a rearranging means for rearranging the plurality of blocks received by said receiving means based upon the block numbers, so as to obtain the original arrangement of blocks; and

an interpolating means for interpolating any of the plurality of blocks received by said receiving means, which have experienced transmission errors, based upon blocks adjacent thereto in the original arrangement of blocks.

7. An image transmission system as claimed in claim 6, wherein said transmitting means further comprises image input means for inputting the image and said receiving device further comprises image output means for reproducing and outputting the image based upon the original arrangement of blocks obtained by said rearranging means and based upon the blocks interpolated by said interpolating means.

8. An image transmission system as claimed in claim 7, wherein said image input means comprises a video camera and said image output means comprises an image display unit.

9. An image transmission system as claimed in claim 6, wherein the original arrangement of blocks and the dispersed arrangement of blocks are each in the form of a matrix and wherein said predetermined rules comprise the selection of blocks in a downward and successive manner along every other column and every other row of the matrix.

10. An image transmission system as claimed in claim 6, wherein said transmitting device further comprises a rule table in which said predetermined rules are stored.

11. An image transmission method for transmitting an image, said image transmission method comprising:

dividing the image into a plurality of blocks so as to obtain an original arrangement of blocks;

dispersing the plurality of blocks based upon predetermined rules so as to obtain a dispersed arrangement of blocks;

transmitting the plurality of blocks, as arranged in the dispersed arrangement of blocks, in a successive manner;

receiving the plurality of blocks, transmitted by said transmitting step, in a successive manner;

rearranging the plurality of blocks received based upon the predetermined rules so as to obtain the original arrangement of blocks; and

interpolating any of the plurality of blocks received by said receiving step, which have experienced transmission errors, based upon blocks adjacent thereto in the original arrangement of blocks.

12. An image transmission method as claimed in claim 11, wherein said image transmission method further comprises inputting the image, and reproducing and outputting the image based upon the original arrangement of blocks obtained by said rearranging step and based upon the blocks interpolated by said interpolating step.

13. An image transmission method as claimed in claim 12, wherein said inputting the image step is performed by using a video camera and said reproducing and outputting the image step is performed by using an image display unit.

14. An image transmission method as claimed in claim 11, wherein the original arrangement of blocks and the dispersed arrangement of blocks are each in the form of a matrix and wherein said predetermined rules comprise the selection of blocks in a downward and successive manner along every other column and every other row of the matrix.

15. An image transmission method as claimed in claim 11, wherein said image transmission method further comprises the storing of the predetermined rules in both a first and second rule table.

16. An image transmission method for transmitting an image, said image transmission method comprising:

dividing the image into a plurality of blocks so as to obtain an original arrangement of blocks and assigning a block number to each of the plurality of blocks so as to identify a location of each of the plurality of blocks in the original arrangement of blocks;

dispersing the plurality of blocks based upon predetermined rules so as to obtain a dispersed arrangement of blocks;

transmitting the plurality of blocks, as arranged in the dispersed arrangement of blocks, in a successive manner;

receiving the plurality of blocks, transmitted by said transmitting step, in a successive manner;

rearranging the plurality of blocks received based upon the block numbers so as to obtain the original arrangement of blocks; and

interpolating any of the plurality of blocks received by said receiving step, which have experienced transmission errors, based upon blocks adjacent thereto in the original arrangement of blocks.

17. An image transmission method as claimed in claim 16, wherein said image transmission method further comprises inputting the image, and reproducing and outputting the image based upon the original arrangement of blocks obtained by said rearranging step and based upon the blocks interpolated by said interpolating step.

18. An image transmission method as claimed in claim 17, wherein said inputting the image step is performed by using a video camera and said reproducing and outputting the image step is performed by using an image display unit.

19. An image transmission system as claimed in claim 16, wherein the original arrangement of blocks and the dispersed arrangement of blocks are each in the form of a matrix and wherein said predetermined rules comprise the selection of blocks in a downward and successive manner along every other column and every other row of the matrix.

20. An image transmission method as claimed in claim 16, wherein said image transmission method further comprises the storing of the predetermined rules in a rule table.