共找到 720 条与 音响、电声设备 相关的标准,共 48 页
本标准规定了数字调音台通用的技术要求、检验方法、检验规则及标志、包装、运输、储存等。本标准适用于数字调音台,模拟调音台可参考使用。
General specification for digital sound console
Speaker performance test method for line array loudspeaker systems
Main performance test methods for theater speaker systems
Packaged internet protocol television (IPTV) applications (IPTV widgets) are lightweight applications,provided with a simple and easily accessible graphical user interface (GUI),that commonly provide a single functionality (e.g.,calendars, feed aggregators, etc.) and might stay persistently exhibited.IPTV widgets may run on different types of IPTV terminal devices and therefore standardized technologies must be supported by the widget engine in the terminal device.Recommendation ITU-T H.765 describes IPTV widget services that are developed using the technologies defined in the ITU-T H.760 multimedia application framework (MAFR) series, such as nested context language(NCL)(Recommendation ITU-T H.761), LIME (Recommendation ITU-T H.762),HTML (new MAFR ITU-T Recommendation under study), cascading style sheets (CSS) (Recommendation ITU-T H.763.1),Services enhanced scripting language (SESL) (Recommendation ITU-T H.764) and Lua (new MAFR ITU-T Recommendation under study).The widget service also takes advantage of functionalities described in the ITU-T H.721 IPTV terminal device basic model,as well as service discovery protocols and services specified in Recommendation ITU-T H.770
Packaged IPTV application (widget) service (Study Group 16)
Recommendation ITU-T H.770 describes the mechanisms for service provider discovery, service discovery and selection for Internet protocol television (IPTV) services. The mechanisms enable IPTV terminal devices to provide the end-users with effective ways for consuming IPTV services.The expected types of IPTV services using service discovery information include linear television (TV),video on demand (VoD),etc.This Recommendation identifies service discovery metadata elements and attributes providing information concerning service providers and contents/services, and its delivery protocols covering both unicast and multicast transport mechanisms.This 2015 edition of the Recommendation adds notes on how to treat "Web Portal URL" in clause 7.1.It also modifies the examples of "Portal URL" and "Metadata server URL",changing those into"://[:]/".In clause 10 it also adds a text to show the example on "Metadata server URL". Moreover,"Preferred Content Guide Discovery record Location" is changed into "Preferred Content Guide Discovery record" in clauses 10.1 and 10.2, and its example has been changed to a Boolean value.Relevant elements/attributes in Appendix II are also changed.This edition of the Recommendation also adds a new service type,"Widget service",to Table 7.1-4.
Mechanisms for service discovery and selection for IPTV services (Study Group 16)
Multimedia systems - Guide to the recommended characteristics of analogue interfaces to achieve interoperability (IEC 61938:2013); German version EN 61938:2013
Sound and television broadcast receivers and associated equipment - Radio disturbance characteristics - Limits and methods of measurement
Sound and television broadcast receivers and associated equipment - Radio disturbance characteristics - Limits and methods of measurement
Sound system equipment. Part 12. Connectors for broadcast systems and similar use
Sound system equipment - Part 4 : microphones
Electroacoustics - Octave-band and fractional-octave-band filters - Part 1: Specifications (IEC 61260-1:2014); German version EN 61260-1:2014
Audio, video and information technology equipment. Routine electrical safety testing in production
Sound system equipment. Microphones
This part of IEC 61883 describes a protocol for the transmission of audio and music data employing IEEE 1394 and specifies essential requirements for the application of the protocol. This protocol can be applied to all modules or devices that have any kind of audio and/or music data processing@ generation and conversion function blocks. This standard deals only with the transmission of audio and music data. The control@ status and machine-readable description of these modules or devices should be defined outside of this standard according to each application area.
Consumer audio/video equipment - Digital interface - Part 6: Audio and music data transmission protocol
(a) General rule. A radio frequency device may not be operated prior to equipment authorization unless the conditions set forth in paragraphs (b), (c), (d) or (e), of this section are meet. Radio frequency devices operated under these provisions may not be marketed (as defined in § 2.803(a)) except as provided elsewhere in this chapter. In addition, the provisions of subpart K continue to apply to imported radio frequency devices.
Telecommunication. Part2:Frequency allocations and radio treaty matters. Subpart I:Marketing of Radiofrequency Devices. Section2.805:Operation of radio frequency devices prior to equipment authorization.
(a) Marketing, as used in this section, includes sale or lease, or offering for sale or lease, including advertising for sale or lease, or importation, shipment, or distribution for the purpose of selling or leasing or offering for sale or lease.
Telecommunication. Part2:Frequency allocations and radio treaty matters. Subpart I:Marketing of Radiofrequency Devices. Section2.803:Marketing of radio frequency devices prior to equipment authorization.
Sound system equipment: Headphones and earphones associated with personal music players - Maximum sound pressure level measurement methodology - Part 2: Matching of sets with headphones if either or both are offered separately, or are offered as one packa
Sound system equipment: Headphones and earphones associated with personal music players - Maximum sound pressure level measurement methodology - Part 1: General method for "one package equipment"; German version EN 50332-1:2013
Sound system equipment - Part 4: Microphones
"FOREWORD This amendment has been prepared by technical area 4: Digital system interfaces and protocols of IEC technical committee 100: Audio@ video and multimedia systems and equipment. Full information on the voting for the approval of this amendment can be found in the report on voting indicated The committee has decided that the contents of this amendment and the base publication will remain unchanged until the stability date indicated on the IEC web site under ""http://webstore.iec.ch"" in the data related to the specific publication. At this date@ the publication will be reconfirmed@ withdrawn@ replaced by a revised edition@ or amended."
Digital audio interface - Part 1: General (TA 4)
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