Cross-platform digital signal processing designs using Java and C

• US 6,128,011 A
• Filed: 08/31/1998
• Issued: 10/03/2000
• Est. Priority Date: 08/31/1998
• Status: Expired due to Term

• Current Assignee: PIMI Marion Holdings, Ltd., Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation Of America (Sony Group Corp.), Sony Electronics Inc. (Sony Group Corp.)
• Inventors: Peng, Jason
• Primary Examiner(s): Bayerl, Raymond J.
• Application Number:
  US09/144,681
• Time in Patent Office: 764 Days
• Field of Search: 345/335, 345/339, 345/970, 345/965, 345/333, 345/440, 709/203, 709/302, 395/500.35, 395/705, 395/707, 702/79, 702/124, 702/126, 702/189, 708/300, 708/321, 708/303, 708/306, 708/400, 703/14, 717/5, 717/7
• US Class Current: 715/744
• CPC Class Codes: G06F 17/10 Complex mathematical operations function generation by table look-up G06F1/03; evaluation of elementary functions by calculation G06F7/544
• CPC Class Codes: G06F 9/44 Arrangements for executing specific programs
• CPC Class Codes: Y10S 715/97 Instrumentation and component modelling, e.g. interactive control panel

Abstract

A platform-independent software-implemented digital signal processing system in a computer system. The digital signal processing system is comprised of a digital signal processing unit implemented in C program code which receives data and applies a process to generate therefrom a computer file representative of a processed response. The digital signal processing system also is comprised of a graphical user interface implemented in Java program code, which generates two-dimensional graphic images and text on the computer system'"'"'s user output device, and is for receiving user-selected process parameters and for displaying the results of the processed response. In addition, the digital signal processing system is comprised of an interface code which provides communication between the graphical user interface and the digital signal processing unit. The interface code is implemented in Java program code and operable such that the digital signal processing unit and graphical user interface, in combination, are platform-independent. In this manner, the present invention provides a DSP software program that includes a graphical user interface section but yet can be operated across multiple computer system platforms without needing to be redesigned or customized for each platform.

Claims

1. In a computer system having a processor coupled to a bus, a memory unit coupled to said bus and a user input device and a user output device, a software implemented digital signal processing system, said digital signal processing system comprising:

a digital signal processing unit implemented in C program code, said digital signal processing unit for receiving data and for applying a process to said data to generate therefrom a computer file representative of a processed response;

a graphical user interface implemented in Java program code, wherein said graphical user interface is for generating two-dimensional graphic images and text on said user output device; and

interface code for providing communication between said graphical user interface and said digital signal processing unit, said interface code implemented in Java program code and operable such that said digital signal processing unit and said graphical user interface, in combination, are hardware platform-independent.

2. A software implemented digital signal processing system as described in claim 1 wherein said graphical user interface comprises an interface for receiving user-selected process parameters.

3. A software implemented digital signal processing system as described in claim 1 wherein said graphical user interface comprises an interface for displaying said processed response.

4. A software implemented digital signal processing system as described in claim 1 wherein said interface code is platform-independent and operable such that said interface code communicates with said digital signal processing unit implemented in C program code.

5. A software implemented digital signal processing system as described in claim 1 wherein said digital signal processing unit implemented in C program code is a finite impulse response filter design.

6. A software implemented digital signal processing system as described in claim 5 wherein said graphical user interface displays the amplitude response, the phase response and the impulse response for low-pass, high-pass, band-pass and band-stop filters.

7. A software implemented digital signal processing system as described in claim 5 wherein said graphical user interface employs rectangular, tapered rectangular, triangular, Hanning, Hamming, and Blackman window functions.

8. A software implemented digital signal processing system as described in claim 1 wherein said digital signal processing unit implemented in C program code is an infinite impulse response filter design.

9. A software implemented digital signal processing system as described in claim 8 wherein said digital signal processing unit comprises Chebyshev Type I, Chebyshev Type II, and Butterworth filters.

10. A software implemented digital signal processing system as described in claim 1 wherein said digital signal processing unit implemented in C program code is a general input and output design.

11. A computer system comprising:

a processor coupled to a bus;

a memory unit coupled to said bus;

a user input device; and

a user output device, wherein said memory unit comprises a software implemented digital signal processing system comprising;

a digital signal processing unit implemented in C program code, said digital signal processing unit for receiving an input stream of data and for applying a process to generate therefrom a computer file representative of a processed response;

a graphical user interface implemented in Java program code, wherein said graphical user interface is for generating two dimensional graphic images and text on said user output device; and

interface code for providing communication between said graphical user interface and said digital signal processing unit, said interface code implemented in Java native interface code and operable such that said digital signal processing unit and said graphical user interface, in combination, are hardware platform-independent.

12. A computer system as described in claim 11 wherein said graphical user interface comprises an interface for receiving user-selected process parameters.

13. A computer system as described in claim 11 wherein said graphical user interface comprises an interface for displaying said processed response.

14. A computer system as described in claim 11 wherein said interface code is platform-independent and operable such that said interface code communicates with said digital signal processing unit implemented in C program code.

15. A computer system as described in claim 11 wherein said digital signal processing unit implemented in C program code is a finite impulse response filter design.

16. A computer system as described in claim 15 wherein said graphical user interface displays the amplitude response, the phase response and the impulse response for low-pass, high-pass, band-pass and band-stop filters.

17. A computer system as described in claim 15 wherein said graphical user interface employs rectangular, tapered rectangular, triangular, Hanning, Hamming, and Blackman window functions.

18. A computer system as described in claim 11 wherein said digital signal processing unit implemented in C program code is an infinite impulse response filter design.

19. A computer system as described in claim 18 wherein said digital signal processing unit comprises Chebyshev Type I, Chebyshev Type II, and Butterworth filters.

20. A computer system as described in claim 11 wherein said digital signal processing unit implemented in C program code is a general input and output design.

21. In a computer system having a processor coupled to a bus, a memory unit coupled to said bus and a user input device and a user output device, a software implemented digital signal processing system, said digital signal processing system comprising:

digital signal processing unit means implemented in C program code, said digital signal processing unit means for receiving an input stream of data and for applying a process to generate therefrom a computer file representative of a processed response;

graphical user interface means implemented in Java program code, wherein said graphical user interface means is for generating two-dimensional graphic images and text on said user output device; and

interface code means for providing communication between said graphical user interface means and said digital signal processing unit means, said interface code means implemented in Java program code and operable such that said digital signal processing unit means and said graphical user interface means, in combination, are hardware platform-independent.

22. A software implemented digital signal processing system as described in claim 21 wherein said graphical user interface means comprises an input interface means for receiving user-selected process parameters and displaying said processed response.

23. A software implemented digital signal processing system as described in claim 21 wherein said interface code means is platform-independent and operable such that said interface code means communicates with said digital signal processing unit means implemented in C program code.

24. A software implemented digital signal processing system as described in claim 21 wherein said digital signal processing unit means implemented in C program code comprises:

a finite impulse response filter design means;

an infinite impulse response filter design means; and

a general input and output design means.

25. A software implemented digital signal processing system as described in claim 21 wherein said graphical user interface means displays the amplitude response, the phase response and the impulse response for low-pass, high-pass, band-pass and band-stop filters.

26. A software implemented digital signal processing system as described in claim 21 wherein said digital signal processing means employs rectangular, tapered rectangular, triangular, Hanning, Hamming, and Blackman window functions.

27. A software implemented digital signal processing system as described in claim 21 wherein said digital signal processing means comprises Chebyshev Type I, Chebyshev Type II, and Butterworth filters.