Method and system of encoding physiological data

• US 6,520,910 B1
• Filed: 10/13/2000
• Issued: 02/18/2003
• Est. Priority Date: 10/13/2000
• Status: Active Grant

• Current Assignee: GE Medical Systems Information Technologies Incorporated (General Electric Company)
• Original Assignee: GE Medical Systems Information Technologies Incorporated (General Electric Company)
• Inventors: Kohls, Mark Robert
• Primary Examiner(s): Hindenburg, Max F.
• Assistant Examiner(s): McCrosky, David J.
• Application Number:
  US09/688,299
• Time in Patent Office: 858 Days
• Field of Search: 607/32, 607/60, 607/9, 600/300, 600/301, 600/515, 600/509, 600/407, 128/920-925, 128/903, 128/904, 382/128-134, 382/232-253, 345/733, 348/77
• US Class Current: 600/300
• CPC Class Codes: A61B 5/0006 ECG or EEG signals
• CPC Class Codes: A61B 5/7232 involving compression of the physiological signal, e.g. to extend the signal recording period
• CPC Class Codes: H04N 19/00 Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
• CPC Class Codes: Y10S 128/922 including image analysis

Abstract

A method and system of encoding physiological data. In one embodiment of the invention, raw data is transformed into formatted images and then the formatted images are encoded. The data is transferred at full resolution once to a main server and then the superimposition of the data is encoded using a compression scheme. Preferably, the data is encoded using difference-based encoding, such as MPEG encoding. Encoding the data in this way makes it possible to perform data analysis on a wide variety of workstations, not just high-performance machines.

Claims

1. A method of encoding physiological data, the method comprising:

acquiring non-image diagnostic data from a patient;

preprocessing the data to transform it to a video stream;

encoding the video stream to compress the preprocessed data;

transferring the encoded data to an analysis device; and

processing the encoded data to generate an output.

2. A method as claimed in claim 1, wherein the data is encoded using a difference-based encoding scheme.

3. A method as claimed in claim 2, wherein the difference-based encoding scheme is an MPEG encoding scheme.

4. A method as claimed in claim 1, wherein the data is encoded using a vector-graphics encoding scheme.

5. A method as claimed in claim 1, wherein preprocessing the data includes decompressing the data.

6. A method of encoding physiological data, the method comprising:

acquiring non-image diagnostic data from a patient;

preprocessing the data to transform it to a video stream and determining a frame rate and a frame size;

encoding the video stream to compress the preprocessed data;

transferring the encoded data to an analysis device; and

processing the encoded data to generate an output.

7. A method as claimed in claim 6, wherein preprocessing the data includes creating a plurality of frames of data.

8. A method as claimed in claim 7, wherein each frame is created by drawing data into a frame buffer for each physiological event that occurs in one frame.

9. A method as claimed in claim 8, wherein encoding the data includes encoding each frame independently after it is created.

10. A method of encoding physiological data, the method comprising:

acquiring non-image diagnostic data from a patient;

preprocessing the data to transform it to a video stream;

encoding the video stream to compress the preprocessed data using a vector-graphics based encoding scheme;

transferring the encoded data to an analysis device; and

processing the encoded data to generate an output.

11. A method as claimed in claim 10, further comprising decompressing the data.

12. A method of encoding physiological data, the method comprising:

acquiring non-image diagnostic data from a patient;

preprocessing the data to transform it to a video stream;

determining a frame rate and a frame size;

encoding the video stream to compress the preprocessed data using a vector-graphics based encoding scheme;

transferring the encoded data to an analysis device; and

processing the encoded data to generate an output.

13. A method as claimed in claim 12, further comprising determining limits of a coordinate plane.

14. A method as claimed in claim 13, further comprising determining a beginning location, in X-Y coordinates, for where to start drawing a waveform.

15. A method as claimed in claim 14, further comprising issuing a moveto command to the beginning location in the plane.

16. A method as claimed in claim 15, further comprising determining a second location and issuing a lineto command to instruct a player to draw a line to the second location.

17. A physiological data review system comprising:

a record and display unit capable of being coupled to a patient to acquire non-image diagnostic data;

an encoder coupled to the record and display unit and operable to convert the data to a video stream and to compress the data; and

a workstation coupled to the encoder.

18. A system as claimed in claim 17, wherein the encoder includes an encoding module and a bypass.

19. A system as claimed claim 17, wherein the encoder includes a difference-based encoding module.

20. A system as claimed in claim 17, wherein the encoder includes a vector-graphics encoding module.

21. A system as claimed in claim 17, wherein the encoder determines a frame rate and a frame size.

22. A system as claimed in claim 17, further comprising a server and wherein the encoder is located on the server.

23. A system as claimed in claim 17, wherein the workstation includes a layer application.

24. A system as claimed in claim 17, wherein the workstation includes a decoding module.

25. A physiological data review system comprising:

a record and display unit capable of being coupled to a patient to receive non-image diagnostic data;

an encoder coupled to the record and display unit and operable to convert the data to a video stream and to compress the data, the encoder determining a frame rate and a frame size and drawing chunks of data into a frame buffer for each physiological event that occurs in one frame; and

a workstation coupled to the encoder.

26. A method of analyzing physiological data comprising:

providing an acquisition and storage device;

acquiring and storing a first set of non-image diagnostic data and a second set of non-image diagnostic data;

formatting the first and second sets of non-image diagnostic data into sequential frames of a video stream;

encoding to compress the video stream; and

transmitting the encoded video stream to a remote computing device.