Method for document viewing

• US 20030135649A1
• Filed: 01/11/2002
• Published: 07/17/2003
• Est. Priority Date: 01/11/2002
• Status: Active Grant

• Current Assignee: Majandro LLC (IP Edge LLC)
• Original Assignee: Xerox Corporation (Xerox Holdings Corp.)
• Inventors: Buckley, Robert R., Spiteri, Pamela B., Rainero, Emil V., Reid, James W.
• Granted Patent: US 7,284,069 B2
• Time in Patent Office: Days
• US Class Current: 709/247
• CPC Class Codes: G06F 16/957 Browsing optimisation, e.g. caching or content distillation
• CPC Class Codes: G06F 3/1454 involving copying of the display data of a local workstation or window to a remote workstation or window so that an actual copy of the data is displayed simultaneously on two or more displays, e.g. teledisplay
• CPC Class Codes: G06T 9/007 Transform coding, e.g. discrete cosine transform
• CPC Class Codes: G09G 2340/02 Handling of images in compressed format, e.g. JPEG, MPEG
• CPC Class Codes: G09G 2340/045 Zooming at least part of an image, i.e. enlarging it or shrinking it
• CPC Class Codes: H04L 67/2895 Intermediate processing functionally located close to the data provider application, e.g. reverse proxies
• CPC Class Codes: H04L 67/565 Conversion or adaptation of application format or content adding application control or application functional data H04L67/561
• CPC Class Codes: H04L 69/329 in the application layer [OSI layer 7]
• CPC Class Codes: H04L 9/40 Network security protocols
• CPC Class Codes: Y10S 707/99945 Object-oriented database structure processing

Abstract

What is disclosed is a method by which a client-side handheld device requests a server to convert server-side documents into a compression format prior to transmission of said documents to the client. The server retrieves and converts the requested documents to a raster image that is then compressed according to attributes based on information received from the client device in the initial document request. Instead of having to manipulate multiple formats which the original documents are in and supported by the server, the client-side device is preferably optimized in hardware and/or software to support and otherwise take advantage of the requested compression format. The compressed document is then delivered to the client device, in whole or in part, selectively or progressively over time per individual requests prior to displaying the received data to the end-user. Depending on the requested delivery mode, server-side documents are preferably compressed using wavelet compression methods, such as the JPEG 2000 standard, known in the arts. Through such a compression format, documents of sizes (in total bytes) exceeding one or more Megabytes can be compressed down to as small as 30 kilobytes or less.

Claims

1. A method for document viewing comprising the steps of:

a) a client-side device requesting a section of a document from a server-side device and said server-side device receiving said request;

b) the server-side device retrieving the requested document and identifying in the retrieved document the requested section;

c) the server-side device converting the identified section into a wavelet compressed image;

d) the server-side device communicating said wavelet compressed image to the client-side device;

e) the client-side device decompressing said received wavelet compressed image; and

f) the client-side device displaying the decompressed document section requested.

2. A method as in claim 1 further comprising the step of repeating steps a-f until said requests are terminated by the client-side device.

3. A method as in claim 1 wherein said wavelet compression is done in accordance with a JPEG2000 standard.

4. A method as in claim 1 wherein communication between said client-side device and said server-side device is done over a wireless link.

5. A method as in claim 1 wherein said client-side device is a handheld device.

6. A method as in claim 1 wherein said requested document section encompasses the entire document.