IEC 62537:2010 pdfダウンロード

IEC 62537:2010 pdfダウンロード。Interface for loudspeakers with digital input signals based on IEC 60958
1 Scope
This International Standard specifies the requirements for a digital loudspeaker interface based on the IEC 60958 series of standards and the MIDI specification. It maximizes flexibility and value by combining these previously separate standards. Together, the two standards provide a simple and flexible digital interface for loudspeakers.
Examples for applications of the interface can be found in Annex C of this standard.
2 Normative references
The following referenced documents are indispensable for the application of this document.
For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
IEC 60958 (all parts), Digital audio interface
IEC 60958-4, Digital audio interface – Part 4: Professional applications
The Complete MIDI 1.0 Detailed Specification v96.1:2001, (Second edition)
3 Terms, definitions and abbreviations
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1 .1
digitally interfaced loudspeaker
device that combines a loudspeaker with an amplifier, where the amplifier has a digital audio input port
NOTE The amplifier and loudspeaker may share a common enclosure, or they may occupy separate enclosures.
The connection between amplifier and loudspeaker and the operating principle of the transducer are left unspecified and may be analogue. In the context of this standard, the term may be abbreviated as loudspeaker or speaker when there is no risk of confusion.
3.1 .2
phantom power
scheme of transmitting electrical power from a source device to a target device using the balanced wiring employed for data transfer; in particular, the power is applied between both balanced signal wires and the ground or shield connection
3.1 .3
audio data
data sent to the loudspeaker that is rendered as sound by the loudspeaker
NOTE Typically this data would be in PCM 2’s complement format.
3.1 .4
control data
data sent to the loudspeaker that controls its operating parameters
3.1 .5
controller
source device for control data
3.1 .6
solid state relay
assembly of an optically controlled power switch and a LED
3.2 Abbreviations
AES Audio Engineering Society
ASIC Application Specific Integrated Circuit
CODEC Coder / Decoder
CPLD Complex Programmable Logic Device
CRC Cyclic Redundancy Check
DSP Digital Signal Processor
FPGA Field Programmable Gate Array
LED Light Emitting Diode
LSB Least Significant Bit
MIDI Musical Instrument Digital Interface
MSB Most Significant Bit
MSC MIDI Show Control
MTC MIDI Time Code
NRPN Non Registered Parameter Number
PCM Pulse Code Modulation
Sysex System-exclusive
4 General
4.1 Feature set
A digitally interfaced loudspeaker conforming to this standard shall implement the following.
• A control data channel from the controller to the loudspeaker which supports transmission of MIDI messages. This may be implemented using the U-bit embedded in the IEC 60958-4 protocol as described in Clause 5.