System and apparatus for compressing and decompressing data stored to a portable data storage device

• US 7,082,483 B2
• Filed: 05/16/2002
• Issued: 07/25/2006
• Est. Priority Date: 05/13/2002
• Status: Expired due to Fees

• Current Assignee: Trek 2000 International Limited (Trek Technology Singapore PTE Limited)
• Original Assignee: Trek Technology Singapore PTE Limited
• Inventors: Poo, Teng Pin
• Primary Examiner(s): Huynh, Kim
• Assistant Examiner(s): CHEN, ALAN S
• Application Number:
  US10/147,124
• Publication Number:
  US 20030217206A1
• Time in Patent Office: 1,531 Days
• Field of Search: 710/2, 710/8, 710/62, 710/63, 710/68, 710/74
• US Class Current: 710/68
• CPC Class Codes: G06F 3/0607 by facilitating the process of upgrading existing storage systems, e.g. for improving compatibility between host and storage device
• CPC Class Codes: G06F 3/0661 Format or protocol conversion arrangements
• CPC Class Codes: G06F 3/0679 Non-volatile semiconductor memory device, e.g. flash memory, one time programmable memory [OTP]
• CPC Class Codes: G11B 20/00007 Time or data compression or expansion audio compression based on psychoacoustics G10L19/00; data processing for reproducing audio data at different playback speeds G10L21/04; video compression H04N19/00; data compression per se H03M7/30

Abstract

A portable memory device is provided that is capable of easy connection to a personal computer via a universal serial bus (USB) port, IEEE 1394 (i.e., firewire) or similar port. Included in the portable memory device is a compression/decompression engine capable of compressing and decompressing data. Data residing on a personal computer or other host platform is compressed by the engine and saved to the memory of the portable memory device. Compressed data is retrieved and decompressed by the engine and transmitted to the personal computer for use by the user. Embodiments of the present invention thus provide a highly convenient system and apparatus for users to access and save larger quantities of data to a relatively small device.

Claims

1. A unitary portable data storage device comprising:

a universal serial bus (USB) plug integral to the storage device, the storage device capable of being directly connected to a USB port of a computer via the plug such that there is an immediate connection between the storage device and the computer without cable interconnection;

a non-removable flash memory having a first storage capacity; and

a data compression engine,

wherein the data compression engine is capable of compressing data for storage in the flash memory so that the capacity of the flash memory exceeds the first storage capacity and the user thereof can manually enable and disable the compression engine.

2. The portable data storage device as in claim 1, further comprising a data decompression engine capable of decompressing data stored to the flash memory of the portable data storage device.

3. The portable data storage device as in claim 1 wherein the user thereof is not aware that the data is being compressed.

4. The portable data storage device as in claim 1 wherein the data is compressed to 50 percent of its original size.

5. The portable data storage device as in claim 1 wherein the flash memory can store therein compressed data, which when decompressed has a size that exceeds the first storage capacity by at least 100%.

12. The portable data storage device as in claim 1 wherein the device is small enough to be fitted substantially in a closed fist.

6. A method of compressing and storing data, the method comprising the steps of:

(a) directly connecting a portable data storage device to a communication port of a host platform via an integral universal serial bus (USB) plug such that there is an immediate connection between the storage device and the host platform without cable interconnection, the portable data storage device including a memory having a first storage capacity;

(b) running a data compression engine residing on the portable data storage device;

(c) compressing data provided by the host platform; and

(d) saving the compressed data to the memory of the portable data storage device, wherein the capacity of the memory exceeds the first storage capacity and the user thereof can manually enable and disable the compression engine.

7. The method as in claim 6 wherein the user thereof is not aware that the data is being compressed.

8. The method as in claim 6 wherein the compressing step comprises compressing the data to 50 percent of its original size.

9. The method as in claim 6 further comprising the step of increasing the capacity of the memory such that the compressed data stored therein, when decompressed, has a size that exceeds the first storage capacity by at least 100%.

10. The method as in claim 6 wherein the device is small enough to be fitted substantially in a closed fist.

11. A method of decompressing data saved to the memory of a portable data storage device, the method comprising the steps of:

(a) connecting the portable data storage device directly to a communication port of a host platform via an integral universal serial bus (USB) plug such that there is an immediate connection between the storage device and the host platform without cable interconnection, the portable data storage device including a memory having a first storage capacity and having stored therein compressed data, which when decompressed has a size that exceeds the first storage capacity;

(b) running a data compression/decompression engine residing on the portable data storage device;

(c) retrieving the compressed data from the memory of the portable data storage device;

(d) decompressing the compressed data; and

(e) transmitting the decompressed data to the host platform,

wherein the user thereof can manually enable and disable the compression engine.

13. The method as in claim 11 wherein the device is small enough to be fitted substantially in a closed fist.