AUDIO DATA TRANSMISSION METHOD FOR TRANSMITTING ENCRYPTED AUDIO DATA, AUDIO PROCESSING SYSTEM AND COMPUTER SYSTEM THEREOF

• US 20080152138A1
• Filed: 12/20/2007
• Published: 06/26/2008
• Est. Priority Date: 12/21/2006
• Status: Abandoned Application

• Current Assignee: Realtek Semiconductor Corp.
• Original Assignee: Realtek Semiconductor Corp.
• Inventors: Chiang, Loung-Wen, Lu, Ti-En, Chiu, Shu-Yeh, Yeh, Tsung-Li
• Application Number:
  US11/960,705
• Publication Number:
  US 20080152138A1
• Time in Patent Office: Days
• US Class Current: 380/210
• CPC Class Codes: H04K 1/00 Secret communication
• CPC Class Codes: H04L 2209/20 Manipulating the length of blocks of bits, e.g. padding or block truncation
• CPC Class Codes: H04L 2209/601 Broadcast encryption
• CPC Class Codes: H04L 9/0631 Substitution permutation network [SPN], i.e. cipher composed of a number of stages or rounds each involving linear and nonlinear transformations, e.g. AES algorithms

Abstract

The present invention provides an audio data transmission method for transmitting encrypted audio data, an audio processing system and computer system thereof. The audio data transmission method includes providing an audio data, performing an encryption process upon the audio data according to an encryption standard, transmitting the encrypted audio data to an audio device according to a link standard, and utilizing the audio device to perform a decryption process upon the encrypted audio data.

Claims

1. An audio processing system, comprising:

an audio data source, for providing audio data;

a host system, coupled to the audio data source, for receiving the audio data and performing an encryption process upon the audio data according to an encryption standard; and

an audio device, coupled to the host system via a link standard, for receiving the audio data encrypted by the host system according to the link standard and performing a decryption process upon the encrypted audio data.

2. The audio processing system of claim 1, wherein the host system is a personal computer.

3. The audio processing system of claim 2, wherein the host system further comprises an application, for performing the encryption process.

4. The audio processing system of claim 1, wherein the encryption standard is an AES encryption standard.

5. The audio processing system of claim 1, wherein the link standard is an HDA link.

6. The audio processing system of claim 5, wherein the audio device is coupled to a Southbridge of the host system via the HDA link.

7. The audio processing system of claim 1, wherein the audio device is an audio CODEC.

8. The audio processing system of claim 1, wherein the audio data source is a DVD optical disc storage device.

9. An audio data transmitting method, comprising:

providing audio data;

performing an encryption process upon the audio data according to an encryption standard;

transmitting the encrypted audio data to an audio device according to a link standard; and

utilizing the audio device to perform a decryption process upon the encrypted audio data.

10. The audio data transmitting method of claim 9, further comprising:

playing the audio data decrypted by the audio device.

11. The audio data transmitting method of claim 9, wherein the encryption standard is an AES encryption standard.

12. The audio data transmitting method of claim 9, wherein the link standard is an HDA link.

13. The audio data transmitting method of claim 9, wherein the audio device is an audio CODEC.

14. The audio data transmitting method of claim 9, wherein the audio data is provided by a DVD optical disc storage device.

15. A computer system, comprising:

an audio data source, for providing audio data;

a host system, coupled to the audio data source, for receiving the audio data and performing an encryption process upon the audio data according to an encryption standard; and

an audio CODEC, coupled to the host system via a link standard, for receiving the audio data encrypted by the host system according to the link standard and performing a decryption process upon the encrypted audio data.

16. The computer system of claim 15, wherein the host system further comprises an application, for performing the encryption process.

17. The computer system of claim 15, wherein the encryption standard is an AES encryption standard.

18. The computer system of claim 15, wherein the link standard is an HDA link.

19. The computer system of claim 18, wherein the audio CODEC is coupled to a Southbridge of the host system via the HDA link.

20. The computer system of claim 15, wherein the audio data source is a DVD optical disc storage device.