CA2577276A1 - System for live audio presentations - Google Patents
System for live audio presentations Download PDFInfo
- Publication number
- CA2577276A1 CA2577276A1 CA002577276A CA2577276A CA2577276A1 CA 2577276 A1 CA2577276 A1 CA 2577276A1 CA 002577276 A CA002577276 A CA 002577276A CA 2577276 A CA2577276 A CA 2577276A CA 2577276 A1 CA2577276 A1 CA 2577276A1
- Authority
- CA
- Canada
- Prior art keywords
- rack
- transmission medium
- data
- stage
- house
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 230000005540 biological transmission Effects 0.000 claims abstract 31
- 238000005070 sampling Methods 0.000 claims abstract 9
- 238000011084 recovery Methods 0.000 claims abstract 5
- 238000000034 method Methods 0.000 claims abstract 3
- 125000004122 cyclic group Chemical group 0.000 claims 2
- 230000001360 synchronised effect Effects 0.000 abstract 1
Landscapes
- Synchronisation In Digital Transmission Systems (AREA)
Abstract
In a live audio presentation system, a stage rack and a front of house rack are interconnected by a transmission medium that transmits digital audio data and control information between them. Packets of digital audio data and control information are sent at the audio sampling rate. The packets of data are encoded using an encoding technique that provides unique codes that may be detected, thus enabling clock recovery of a clock signal embedded in the data packets. Data packets may include data for error checking. A serial digital transmission medium may be used as the transmission medium. Such a transmission medium uses low voltage signals and supports high bit rates. The system is synchronized by the FOH rack which transmits data to the stage rack according to a local audio sample clock or an external audio sample clock to which it synchronizes. This clock is embedded in data packets sent to the stage rack. The stack rack recovers the audio sample clock from data received from the FOH rack and synchronizes its receive and transmit operations to this recovered clock. The FOH rack recovers the audio sample clock from data received from the stage rack and synchronizes its receive operations to this recovered clock. The FOH rack may include an embedded computer that processes the digital audio data, and may include DSP processing that handles so-called plug-in software. A digital audio workstation or sequencer also may be connected to the FOH rack to either record the live presentation or to inject edited, recorded audio into the live presentation.
Claims (22)
1. A stage rack for a live audio presentation system, comprising:
logic for processing input digital audio data and control information and for providing output digital audio data and control information;
a receive interface for receiving a signal from a first transmission medium, wherein the signal includes encoded data packets occurring at an audio sampling rate and including a unique code, and for recovering a bit clock signal using the unique codes in the data packets, and for recovering, and providing to the logic, digital audio data and control information from the data packets; and a transmit interface for sending a signal over a second transmission medium, wherein the signal includes encoded data packets occurring at the audio sampling rate, wherein the encoded data packets are received from the logic and include digital audio data and control information and a unique code from which a bit clock signal can be recovered, wherein bits of the encoded data packets are sent in synchronization with the bit clock signal recovered by the receive interface.
logic for processing input digital audio data and control information and for providing output digital audio data and control information;
a receive interface for receiving a signal from a first transmission medium, wherein the signal includes encoded data packets occurring at an audio sampling rate and including a unique code, and for recovering a bit clock signal using the unique codes in the data packets, and for recovering, and providing to the logic, digital audio data and control information from the data packets; and a transmit interface for sending a signal over a second transmission medium, wherein the signal includes encoded data packets occurring at the audio sampling rate, wherein the encoded data packets are received from the logic and include digital audio data and control information and a unique code from which a bit clock signal can be recovered, wherein bits of the encoded data packets are sent in synchronization with the bit clock signal recovered by the receive interface.
2. The stage rack of claim 1, wherein the logic encodes the digital audio data and control information using a form of encoding that results in a DC-free signal.
3. The stage rack of claim 1, wherein the logic encodes the digital audio data and control information using a form of encoding that provides unique codes.
4. The stage rack of claim 3, wherein the form of encoding is 8B10B encoding.
5. The stage rack of claim 1, wherein the transmission medium is a serial digital interface for video data.
6. The stage rack of claim 1, wherein the encoded data packets include error recovery data.
7. The stage rack of claim 6, wherein the error recovery data includes cyclic redundancy check data.
8. A front of house rack for a live audio presentation system, comprising:
logic for processing input digital audio data and control information and for providing output digital audio data and control information;
a receive interface for receiving a signal from a first transmission medium, wherein the signal includes encoded data packets occurring at an audio sampling rate and including a unique code, and for recovering a bit clock signal using the unique codes in the data packets, and for recovering, and providing to the logic, digital audio data and control information from the data packets; and a transmit interface for sending a signal over a second transmission medium, wherein the signal includes encoded data packets occurring at the audio sampling rate, wherein the encoded data packets are received from he logic and include digital audio data and control information and a unique code from which a bit clock signal can be recovered, wherein bits of the encoded data packets are sent in synchronization with a bit clock signal generated in response to a reference audio sample clock signal.
logic for processing input digital audio data and control information and for providing output digital audio data and control information;
a receive interface for receiving a signal from a first transmission medium, wherein the signal includes encoded data packets occurring at an audio sampling rate and including a unique code, and for recovering a bit clock signal using the unique codes in the data packets, and for recovering, and providing to the logic, digital audio data and control information from the data packets; and a transmit interface for sending a signal over a second transmission medium, wherein the signal includes encoded data packets occurring at the audio sampling rate, wherein the encoded data packets are received from he logic and include digital audio data and control information and a unique code from which a bit clock signal can be recovered, wherein bits of the encoded data packets are sent in synchronization with a bit clock signal generated in response to a reference audio sample clock signal.
9. The front of house rack of claim 8, wherein the logic encodes the digital audio data and control information using a form of encoding that results in a DC-free signal.
10. The front of house rack of claim 8, wherein the logic encodes the digital audio data and control information using a form of encoding that provides unique codes.
11. The front of house rack of claim 10, wherein the form of encoding is 8B10B
encoding.
encoding.
12. The front of house rack of claim 8, wherein the transmission medium is a serial digital interface for video data.
13. The front of house rack of claim 8, wherein the encoded data packets include error recovery data.
14. The front of house rack of claim 13, wherein the error recovery data includes cyclic redundancy check data.
15. The front of house rack of claim 8, wherein the reference audio sample clock signal is generated by a local oscillator.
16. The front of house rack of claim 8, wherein the reference audio sample clock signal is provided by an external reference audio sample clock signal, and wherein the logic determines whether a rate of the external reference audio sample clock signal is within a specified range of an expected audio sample clock rate.
17. A live audio presentation system, comprising;
one or more stage racks;
a front of house rack;
a first transmission medium connected between the stage rack and the front of house rack to communicate data from the front of house rack to the stage rack;
a second transmission medium connected between the stage rack and the front of house rack to communicate data from the stage rack to the front of house rack;
wherein the front of house rack includes a transmit interface for sending a signal over the first transmission medium, wherein the signal includes encoded data packets occurring at the audio sampling rate, wherein the encoded data packets are received from the logic and include digital audio data and control information and a unique code from which a bit clock signal can be recovered, wherein bits of the encoded data packets are sent in synchronization with a bit clock signal generated in response to a reference audio sample clock signal;
wherein at least one of the one or more stage racks includes a receive interface for receiving a signal from the first transmission medium, wherein the signal includes encoded data packets occurring at an audio sampling rate and including a unique code, and for recovering a bit clock signal using the unique codes in the data packets, and for recovering digital audio data and control information from the data packets;
wherein the at least one of the one or more stage racks includes a transmit interface for sending a signal over the second transmission medium, wherein the signal includes encoded data packets occurring at the audio sampling rate, wherein the encoded data packets are received from the logic and include digital audio data and control information and a unique code from which a bit clock signal can be recovered, wherein bits of the encoded data packets are sent in synchronization with the bit clock signal recovered by the receive interface of the stage rack;
wherein the front of house rack includes a receive interface for receiving a signal from the second transmission medium, wherein the signal includes encoded data packets occurring at an audio sampling rate and including a unique code, and for recovering a bit clock signal using the unique codes in the data packets, and for recovering digital audio data and control information from the data packets.
one or more stage racks;
a front of house rack;
a first transmission medium connected between the stage rack and the front of house rack to communicate data from the front of house rack to the stage rack;
a second transmission medium connected between the stage rack and the front of house rack to communicate data from the stage rack to the front of house rack;
wherein the front of house rack includes a transmit interface for sending a signal over the first transmission medium, wherein the signal includes encoded data packets occurring at the audio sampling rate, wherein the encoded data packets are received from the logic and include digital audio data and control information and a unique code from which a bit clock signal can be recovered, wherein bits of the encoded data packets are sent in synchronization with a bit clock signal generated in response to a reference audio sample clock signal;
wherein at least one of the one or more stage racks includes a receive interface for receiving a signal from the first transmission medium, wherein the signal includes encoded data packets occurring at an audio sampling rate and including a unique code, and for recovering a bit clock signal using the unique codes in the data packets, and for recovering digital audio data and control information from the data packets;
wherein the at least one of the one or more stage racks includes a transmit interface for sending a signal over the second transmission medium, wherein the signal includes encoded data packets occurring at the audio sampling rate, wherein the encoded data packets are received from the logic and include digital audio data and control information and a unique code from which a bit clock signal can be recovered, wherein bits of the encoded data packets are sent in synchronization with the bit clock signal recovered by the receive interface of the stage rack;
wherein the front of house rack includes a receive interface for receiving a signal from the second transmission medium, wherein the signal includes encoded data packets occurring at an audio sampling rate and including a unique code, and for recovering a bit clock signal using the unique codes in the data packets, and for recovering digital audio data and control information from the data packets.
18. The live audio presentation system of claim 17, further comprising:
a first redundant transmission medium connected between the stage rack and the front of house rack to communicate data from the stage rack to the front of house rack;
and a second redundant transmission medium connected between the stage rack and the front of house rack to communicate data from the front of house rack to the stage rack.
a first redundant transmission medium connected between the stage rack and the front of house rack to communicate data from the stage rack to the front of house rack;
and a second redundant transmission medium connected between the stage rack and the front of house rack to communicate data from the front of house rack to the stage rack.
19. The live audio presentation system of claim 18, including a means for detecting an error on the first transmission medium and for automatically switching to receiving from the first transmission medium.
20. The live audio presentation system of claim 18, including a means for detecting an error on the second transmission medium and for automatically switching to receiving from the second transmission medium.
21. A live audio presentation system, comprising;
one or more stage racks;
a front of house rack;
a first transmission medium connected between the stage rack and the front of house rack to communicate data from the front of house rack to the stage rack;
a second transmission medium connected between the stage rack and the front of house rack to communicate data from the stage rack to the front of house rack;
a first redundant transmission medium connected between the stage rack and the front of house rack to communicate data from the stage rack to the front of house rack;
and a second redundant transmission medium connected between the stage rack and the front of house rack to communicate data from the front of house rack to the stage rack;
means for detecting an error on the first transmission medium and for automatically switching to receiving from the first transmission medium;
means for detecting an error on the second transmission medium and for automatically switching to receiving from the second transmission medium.
one or more stage racks;
a front of house rack;
a first transmission medium connected between the stage rack and the front of house rack to communicate data from the front of house rack to the stage rack;
a second transmission medium connected between the stage rack and the front of house rack to communicate data from the stage rack to the front of house rack;
a first redundant transmission medium connected between the stage rack and the front of house rack to communicate data from the stage rack to the front of house rack;
and a second redundant transmission medium connected between the stage rack and the front of house rack to communicate data from the front of house rack to the stage rack;
means for detecting an error on the first transmission medium and for automatically switching to receiving from the first transmission medium;
means for detecting an error on the second transmission medium and for automatically switching to receiving from the second transmission medium.
22. A live audio presentation system, comprising;
one or more stage racks;
a front of house rack; and a transmission medium connected between the stage rack and the front of house rack to communicate data from the front of house rack to the stage rack;
wherein the front of house rack includes:
a computer executing a process for processing audio information, and a set of digital signal processors connected to the computer for performing audio processing on audio information according to plug-in code provided by the computer.
one or more stage racks;
a front of house rack; and a transmission medium connected between the stage rack and the front of house rack to communicate data from the front of house rack to the stage rack;
wherein the front of house rack includes:
a computer executing a process for processing audio information, and a set of digital signal processors connected to the computer for performing audio processing on audio information according to plug-in code provided by the computer.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US90608404P | 2004-09-10 | 2004-09-10 | |
| US60/906,084 | 2004-09-10 | ||
| PCT/US2005/031758 WO2006031527A2 (en) | 2004-09-10 | 2005-09-09 | System for live audio presentations |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2577276A1 true CA2577276A1 (en) | 2006-03-23 |
Family
ID=38066768
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002577276A Abandoned CA2577276A1 (en) | 2004-09-10 | 2005-09-09 | System for live audio presentations |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2008514054A (en) |
| CA (1) | CA2577276A1 (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6980616B1 (en) * | 1999-01-19 | 2005-12-27 | Sharp Kabushiki Kaisha | Transmission method and device |
| US6507658B1 (en) * | 1999-01-27 | 2003-01-14 | Kind Of Loud Technologies, Llc | Surround sound panner |
| JP2000307647A (en) * | 1999-04-16 | 2000-11-02 | Sony Corp | Data reception device |
| ES2481615T3 (en) * | 1999-04-26 | 2014-07-31 | Gibson Brands, Inc. | Musical instrument with output for stereo headphones |
| GB2417867B (en) * | 2004-09-03 | 2007-04-11 | Sony Uk Ltd | Data transmission |
-
2005
- 2005-09-09 JP JP2007531279A patent/JP2008514054A/en active Pending
- 2005-09-09 CA CA002577276A patent/CA2577276A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| JP2008514054A (en) | 2008-05-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued |