Method and system for broadcasting digital audio and video to an analog wireless device

• US 6,335,768 B1
• Filed: 05/04/1998
• Issued: 01/01/2002
• Est. Priority Date: 05/04/1998
• Status: Active Grant

• Current Assignee: Google Technology Holdings LLC (Alphabet Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Williams, Michael E., Geranen, Jack Scott, Cucuzella, Mathew, Reinold, Jurgen, Lee, Jeff, Knappenberger, David
• Primary Examiner(s): Harvey, David E.
• Application Number:
  US09/071,045
• Time in Patent Office: 1,338 Days
• Field of Search: H04/N.538, H04/5.44, H04/7.10, H04/7.22, H04/7.20, H04/7.167, H04/7.16, H04/7.13, 348/723, 348/724, 348/725, 725/153, 725/151, 725/68, 725/70, 380/42, 380/205
• US Class Current: 348/723
• CPC Class Codes: H04H 20/08 among terminal devices
• CPC Class Codes: H04H 20/63 to plural spots in a confined site, e.g. MATV [Master Antenna Television]
• CPC Class Codes: H04H 60/80 characterised by transmission among terminal devices
• CPC Class Codes: H04N 21/426 Internal components of the client ; Characteristics thereof H04N5/44 takes precedence
• CPC Class Codes: H04N 21/43637 involving a wireless protocol, e.g. Bluetooth, RF or wireless LAN [IEEE 802.11] arrangements for wireless networking or broadcasting of information in indoor or near-field type systems H04B10/114
• CPC Class Codes: H04N 21/439 Processing of audio elementary streams
• CPC Class Codes: H04N 5/38 Transmitter circuitry for the transmission of television signals according to analogue transmission standards H04N5/14 takes precedence
• CPC Class Codes: H04N 5/602 for digital sound signals
• CPC Class Codes: H04N 7/1675 Providing digital key or authorisation information for generation or regeneration of the scrambling sequence pseudo-random number generators in general G06F7/58

Abstract

An audio input interface (122) receives a digital audio signal and identifies an audio bitstream which is optionally decrypted by a decryption unit (123), and decoded by an audio decoding unit (124). An audio digital to analog converter (126) converts the decoded audio bitstream to an analog audio signal which is optionally decrypted by an audio analog decryption unit (127). A video input interface (142) receives a digital video signal and identifies a video bitstream which is optionally decrypted by a video digital decryption unit (143), and decoded by a video decoding unit (144). A video digital to analog converter (146) converts the decoded video bitstream to an analog video signal that is optionally decrypted by a video analog decryption unit (147). An analog transmitter (150) mixes the analog audio signal and analog video signal and transmits an analog wireless output signal to an analog wireless device (110).

Claims

1. A system for broadcasting audio content of a digital audio signal to an analog wireless device, comprising:

an audio input interface receiving the digital audio signal and identifying an audio bitstream, wherein the audio bitstream comprises audio data based on a plurality of encoding methods;

an audio decoding unit connected to the audio input interface and decoding the audio bitstream;

an audio digital to analog converter connected to the audio decoding unit and converting the audio bitstream to an analog audio signal; and

an analog transmitter connected to the audio digital to analog converter and transmitting the analog audio signal to the analog wireless device.

2. The system of claim 1, further comprising an audio digital decryption unit connected to the audio input interface and decrypting the audio bitstream.

3. The system of claim 1, further comprising an audio analog decryption unit connected to the audio digital to analog converter and decrypting the analog audio signal.

4. The system of claim 1 wherein the analog transmitter transmits the analog audio signal to multiple devices.

5. The system of claim 1 wherein the audio input interface receives the digital audio signal from a network.

6. The system of claim 1 wherein the audio input interface receives the digital audio signal from a local storage device.

7. The system of claim 1 wherein the audio input interface receives the digital audio signal produced by a text-to-speech application.

8. The system of claim 1 wherein the audio input interface receives the digital audio signal produced by a digital musical instrument.

9. A system for broadcasting video content of a digital video signal to an analog wireless device, comprising:

a video input interface receiving the digital video signal and identifying a video bitstream, wherein the video bitstream comprises video data based on a plurality of encoding methods;

a video decoding unit connected to the video input interface and decoding the video bitstream;

a video digital to analog converter connected to the video decoding unit and converting the video bitstream to an analog video signal; and

an analog transmitter connected to the video digital to analog converter and transmitting the analog video signal to the analog wireless device.

10. The system of claim 9, further comprising a video digital decryption unit connected to the video input interface and decrypting the video bitstream.

11. The system of claim 9, further comprising a video analog decryption unit connected to the video digital to analog converter and decrypting the analog video signal.

12. The system of claim 9 wherein the analog transmitter transmits the analog video signal to multiple devices.

13. The system of claim 9 wherein the video input interface receives the digital video signal from a network.

14. The system of claim 9 wherein the video input interface receives the digital video signal from a local storage device.

15. The system of claim 9 wherein the video input interface receives the digital video signal produced by a digital video camera.

16. A system for broadcasting audio and video content of a digital audio signal and a digital video signal to an analog wireless device, comprising:

an audio input interface receiving the digital audio signal and identifying an audio bitstream, wherein the audio bitstream comprises audio data based on a plurality of encoding methods;

an audio decoding unit connected to the audio input interface and decoding the audio bitstream;

an audio digital to analog converter connected to the audio decoding unit and converting the audio bitstream to an analog audio signal;

a video input interface receiving the digital video signal and identifying a video bitstream, wherein the video bitstream comprises video data based on a plurality of encoding methods;

a video decoding unit connected to the video input interface and decoding the video bitstream;

a video digital to analog converter connected to the video decoding unit and converting the video bitstream to an analog video signal; and

an analog transmitter connected to the audio digital to analog converter and connected to the video digital to analog converter, mixing the analog audio signal and the analog video signal to produce an analog wireless output signal, and transmitting the analog wireless output signal to the analog wireless device.

17. The system of claim 16, further comprising a splitter receiving a digital input signal and splitting the digital input signal into the digital audio signal and the digital video signal.

18. The system of claim 16 wherein the video input interface receives the digital video signal from a network.

19. The system of claim 16 wherein the video input interface receives the digital video signal from a local storage device.

20. The system of claim 16 wherein the video input interface receives the digital video signal produced by a digital video camera.

21. A method for broadcasting audio content of a digital audio signal to an analog wireless device, comprising the steps of:

receiving the digital audio signal and identifying an audio bitstream, wherein the audio bitstream comprises audio data based on a plurality of encoding methods;

decoding the audio bitstream;

converting the audio bitstream to an analog audio signal; and

transmitting the analog audio signal to the analog wireless device.

22. The of claim 21, further comprising the step of decrypting the audio bitstream.

23. The method of claim 21, further comprising the step of decrypting the analog audio signal.

24. The method of claim 21 wherein the step of decoding the audio bitstream includes decompressing the audio bitstream.

25. A method for broadcasting video content of a digital video signal to an analog wireless device, comprising the steps of:

receiving the digital video signal and identifying a video bitstream, wherein the video bitstream comprises video data based on a plurality of encoding methods;

decoding the video bitstream;

converting the video bitstream to an analog video signal; and

transmitting the analog video signal to the analog wireless device.

26. The method of claim 25, further comprising the step of decrypting the video bitstream.

27. The method of claim 25, further comprising the step of decrypting the analog video signal.

28. The method of claim 25 wherein the step of decoding the video bitstream includes decompressing the video bitstream.

29. A method for broadcasting audio and video content of a digital audio signal and a digital video signal to an analog wireless device, comprising the steps of:

receiving the digital audio signal and identifying an audio bitstream, wherein the audio bitstream comprises audio data based on a plurality of encoding methods;

decoding the audio bitstream;

converting the audio bitstream to an analog audio signal;

receiving the digital video signal and identifying a video bitstream, wherein the video bitstream comprises video data based on a plurality of encoding methods;

decoding the video bitstream;

converting the video bitstream to an analog video signal;

mixing the analog audio signal and the analog video signal to produce an analog wireless output signal; and

transmitting the analog wireless output signal to the analog wireless device.

30. The method of claim 29, further comprising the steps of:

receiving a digital input signal as an integrated digital input signal; and

splitting the digital input signal into the digital audio signal and the digital video signal.