Method for transmitting multiresolution image data in a radio frequency communication system

• US 5,940,117 A
• Filed: 07/16/1996
• Issued: 08/17/1999
• Est. Priority Date: 07/16/1996
• Status: Expired due to Term

• Current Assignee: Ericsson, Inc. (Telefonaktiebolaget LM Ericsson)
• Original Assignee: Ericsson, Inc. (Telefonaktiebolaget LM Ericsson)
• Inventors: Hassan, Amer, Matthews, David G.
• Primary Examiner(s): Kostak, Victor R.
• Application Number:
  US08/682,043
• Time in Patent Office: 1,127 Days
• Field of Search: 348/384, 348/12, 348/13, 348/426, 348/469, 358/260, 358/433, 345/328
• US Class Current: 725/115
• CPC Class Codes: H04N 19/162 User input
• CPC Class Codes: H04N 19/63 using sub-band based transform, e.g. wavelets

Abstract

The present invention relates to a method for transmitting multiresolution image data via wireless devices in a radio frequency communication system wherein images are decomposed into levels of resolution. The image data is stored in discrete information blocks in an image storage unit including a base image and one or more image details. The base image represents the coarsest resolution of the image. Each image detail, when added to the base image, improves the resolution of the image. An image display unit transmits a request for image data to the image storage unit. In response to the initial request, the base image is transmitted to the image display unit. If the base image is insufficient, the resolution can be increased incrementally by sending additional image data requests to transmit additional image detail. The additional image detail is then transmitted to the image display unit and recombined with the base image to provide a higher level of resolution to the image.

Claims

1. A method for transmitting multiresolution image data via wireless devices in a radio frequency communication system, comprising the steps of:

a) decomposing the image into a base image having a predetermined minimum resolution and one or more image details which can be sequentially combined with the base image to create detail images of increasingly higher resolution;

b) storing the base image and image details as discrete information blocks in an image storage unit;

c) transmitting the base image stored in the image storage unit to an image display unit;

d) storing the base image in said image display unit;

e) transmitting additional image data requests to the image storage unit;

f) transmitting additional image details stored in the image storage unit to the image display unit in response to said additional image data requests; and

g) recombining the additional image details with the base image at the image display unit to create a higher resolution detail image.

2. The method of claim 1 wherein the base image is stored in a main memory in said image display unit.

3. The method according to claim 2 wherein said image details are stored in an auxiliary memory in said image display unit prior to being combined with said base image.

4. The method of claim 3 wherein an image processor in the image display unit recombines said image details with the image in the main memory and stores the resultant detail image in the main memory.

5. The method of claim 4 wherein the image in said main memory is displayed on a display device.

6. The method according to claim 1 wherein the step of transmitting additional image data requests comprises sending a multiple image data request for multiple image details.

7. The method according to claim 6 wherein the step of transmitting additional image details includes transmitting multiple image details in response to a multiple image data request.

8. The method according to claim 7 wherein the step of transmitting multiple image details includes combining said multiple image details prior to transmission to said image display unit.

9. The method according to claim 7 wherein the step of transmitting multiple image details includes transmitting said image details as a string of discrete information blocks.

10. The method according to claim 1 including the step of storing at said image storage unit a count of the total number of information blocks transmitted to said image display unit.

11. The method according to claim 10 wherein the step of transmitting said image details includes determining the total number of information blocks previously transmitted to the image display unit, transmitting the next image detail, and incrementing said total count.

12. The method according to claim 1 wherein the image data requests originate from the image storage unit.

13. The method according to claim 1 further including the step of limiting the available resolution levels at the image storage unit.

14. The method according to claim 1 further including the step of limiting the availability of multiresolution image data to an authorized user.

15. A method for transmitting an image between an image storage unit and an image display unit, comprising:

a) decomposing an image into discrete information blocks including a base image and one or more image details;

b) storing said information blocks in said image storage unit;

c) sending a first image data request to said image storage unit;

d) transmitting an information block containing said base image from said image storage unit to said image display unit in response to said first image data request;

e) displaying said base image at said image display unit;

f) sending one or more additional image data requests to said image storage unit;

g) transmitting additional information blocks containing image details from said image storage unit to said image display unit in response to said additional image data requests;

h) combining at said image display unit said image details with said base image and any previous image details received by said image display unit to create a new detail image of higher resolution than the previous image; and

i) displaying the new detail image at said image display unit.

16. The method of claim 15 wherein the base image is stored in a main memory in said image display unit.

17. The method according to claim 16 wherein said image details are stored in an auxiliary memory in said image display unit prior to being combined with said base image.

18. The method of claim 17 wherein an image processor in the image display unit recombines said image details with the image in the main memory and stores the resultant detail image in the main memory.

19. The method of claim 18 wherein the image in said main memory is displayed on a display device.

20. The method according to claim 15 wherein the step of transmitting additional image data requests comprises sending a multiple image data request for multiple image details.

21. The method according to claim 20 wherein the step of transmitting additional image details includes transmitting multiple image details in response to a multiple image data request.

22. The method according to claim 21 wherein the step of transmitting multiple image details includes combining said multiple image details prior to transmission to said image display unit.

23. The method according to claim 21 wherein the step of transmitting multiple image details includes transmitting said image details as a string of discrete information blocks.

24. The method according to claim 15 including the step of storing at said image storage unit a count of the total number of information blocks transmitted to said image display unit.

25. The method according to claim 24 wherein the step of transmitting said image details includes determining the total number of information blocks previously transmitted to the image display unit, and transmitting the next image detail, and incrementing said total count.

26. A multiresolution image transmission system comprising:

a) an image storage unit having a memory for storing a decomposed image in discrete information blocks including a base image having a predetermined minimum resolution and one or more image details which can be sequentially combined with said base image to create detail images of increasingly higher resolution;

b) an image display unit including an image display;

c) communication means linking said image storage unit with said image display unit;

d) request means for sending image data requests to said image storage unit, said image storage unit being responsive to said image data requests to send stored image data to said image display in discrete units beginning with said base image and stepping incrementally through said image details until the last image detail is reached; and

e) image processing means in said image display unit for combining said base image with said image details to create detail images of increasingly higher resolution with the addition of each image detail.

27. The multiresolution image transmission system of claim 26 wherein the image display unit includes a main memory for storing the base image and any detail images to be displayed.

28. The multiresolution image transmission system according to claim 27 wherein said image display unit includes an auxiliary memory for storing said image details prior to being combined with said base image.

29. The multiresolution image transmission system according to claim 26 wherein said incremental command means comprises a push-button on said image display unit.

30. The multiresolution transmission system according to claim 29 wherein said image display unit further includes a counter for counting the presses of said push-button.

31. The multiresolution image transmission system according to claim 30 wherein said data request means further includes an elapsed time counting means for measuring the elapsed time from the initial press of said push-button, said counter being operative to count the number of times the push-button is pressed within a predetermined time period from said initial press of the push-button as measured by said elapsed time counting means.

32. The multiresolution image transmission system of claim 31 wherein said data request means is responsive to said counter to transmit said request for an additional number of information blocks equal to the value of said counter.

33. The multiresolution image transmission system according to claim 26 wherein said image storage unit includes counting means for counting the total number of information blocks transmitted to said image display unit, said image storage unit being responsive to an image data request to transmit the next information block.