Decryption and decompression based audio system

• US 7,783,014 B1
• Filed: 05/07/2007
• Issued: 08/24/2010
• Est. Priority Date: 03/26/1999
• Status: Expired due to Fees

• Current Assignee: Dr. Hark C. Chan
• Original Assignee: Dr. Hark C. Chan
• Inventors: Chan, Hark C.
• Primary Examiner(s): Gauthier; Gerald
• Application Number:
  US11/744,951
• Time in Patent Office: 1,205 Days
• Field of Search: 379/88.26, 379/88.02, 379/88.17, 380/30, 380/54, 380/210, 380/211, 380/237, 380/286, 713/191, 713/193, 713/163, 713/168, 713/169, 713/156, 713/176, 713/189, 726/2, 709/229, 725/110
• US Class Current: 379/88.26
• CPC Class Codes: H04M 1/72433 for voice messaging, e.g. dictaphones for answering incoming calls H04M1/64

Abstract

A sending device exchanges handshake signals with a receiving device prior to the delivery of compressed digital audio data. The sending and receiving devices are remotely connected using a data network. In one embodiment of the present invention, the sending device sends an access code to the receiving device. The access code is an encrypted data of two components: a digital data associated with the sending device and a digital data associated with the receiving device. The receiving device decrypts the access code. The receiving device stores the compressed digital audio data in its memory if the decrypted access code contains the correct components.

Claims

1. An audio device comprising:

a memory system for storing data, the data including a decryption key and a first set of digital data associated with the audio device;

an interface for receiving from a remote sender a second set of digital data and a set of compressed digital audio data;

a processor system for decrypting the second set of digital data using the decryption key and comparing at least a portion of the decrypted second set of digital data with the first set of digital data, the processor system storing the set of compressed digital audio data to the memory system if result of the comparison allows the storing;

an output for indicating to the user that the set of compressed digital audio data is available for listening;

the processor system further for decompressing the set of compressed digital audio data stored in the memory system to generate decompressed digital audio data, when requested by the user; and

a digital to analog converter for converting the decompressed digital audio data to analog audio signal.

2. The audio device of claim 1 wherein at least a portion of the second set of digital data is associated with an identification of the sender, wherein the processor system also compares the decrypted second set of digital data with the identification.

3. The audio device of claim 1 wherein the compressed digital audio data is encrypted, the processor system further for decrypting the encrypted compressed digital audio data.

4. The audio device of claim 1 wherein the interface reports a status of the audio device to the sender.

12. The audio device of claim 1 wherein the interface is a data network interface.

13. The audio device of claim 1 wherein the output indicates an identification of the sender.

14. The audio device of claim 1 further comprising a microphone and an analog to digital converter.

5. A method for an audio device to generate analog audio signal, comprising:

storing a decryption key and a first set of digital data associated with the audio device receiving from a remote sender a second set of digital data;

decrypting the second set of digital data;

comparing at least a portion of the decrypted second set of digital data with the first set of digital data;

receiving from the remote sender a set of compressed digital audio data and storing the set of compressed digital audio data into memory when permitted by the comparing;

indicating to a user that the set of compressed digital audio data is available for listening;

retrieving the set of compressed digital audio data from the memory when requested by the user and decompressing the retrieved set of compressed digital audio data to generate decompressed digital audio data; and

converting the decompressed digital audio data to analog audio signal.

6. The method of claim 5 wherein at least a portion of the second set of digital data is associated with an identification of the sender, wherein the comparing also compares the decrypted second set of digital data with the identification.

7. The method of claim 5 wherein the compressed digital audio data is encrypted, the method further comprising decrypting the encrypted compressed digital audio data.

8. The method of claim 5 comprising reporting a status of the audio device to the sender.

9. The method of claim 5 wherein the audio device comprises a telephone.

10. The method of claim 9 wherein the sender comprises another telephone, and wherein at least a portion of the second set of digital data is associated with a telephone number of the sender.

11. The method of claim 9 wherein the sender comprises another telephone, and wherein at least a portion of the second set of digital data is associated with an interne address of the sender.