IEC 61606-4-2005
音频和视听设备.数字音频部分.音频特性的基本测量方法.第4部分:个人电脑
Audio and audiovisual equipment - Digital audio parts - Basic measurements methods of audio characteristics - Part 4: Personal computer
说明：
- 此图仅显示与当前标准最近的5级引用；
- 鼠标放置在图上可以看到标题编号；
- 此图可以通过鼠标滚轮放大或者缩小；
- 表示标准的节点，可以拖动；
- 绿色表示标准：IEC 61606-4-2005 ， 绿色、红色表示本平台存在此标准，您可以下载或者购买，灰色表示平台不存在此标准；
- 箭头终点方向的标准引用了起点方向的标准。
- 标准号
- IEC 61606-4-2005
- 发布日期
- 2005年12月
- 实施日期
- 废止日期
- 无
- 中国标准分类号
- M73
- 国际标准分类号
- 33.160.30;35.160
- 发布单位
- 国际电工委员会
- 引用标准
- IEC 60038 IEC 60268-2 IEC 61606-1 IEC 61606-2 IEC 61672-1
- 被代替标准
- IEC 100/952/CDV-2005
- 适用范围
- This part of IEC 61606 specifies the basic measurement methods of a linear PCM signal for an audio part of personal computers (PCs) and applies to both desktop and portable computers. The common measuring conditions and methods are described in IEC 61606-1. Specific conditions and methods of measurement for PCs are given in this standard. NOTE 1 The methods described are mostly based on sampling frequencies from 8 kHz to 192 kHz and bit length from 8 bit to 24 bit. NOTE 2 This standard describes tests for equipment which has digital input with analogue output and analogue input with digital output. Digital input data are provided from an internal HDD or other memory media and output digital data are recorded to an internal HDD or main memories. NOTE 3 The methods specified in this standard are not applicable to systems incorporating bit-rate reduced digital audio signals that have data loss or to 1-bit signals. This part does not apply to analogue input with analogue output and digital input with digital output as described in IEC 61606-1. NOTE 4 When a CPU in a PC is overloaded by tasks other than those for audio input/output, the PC may fail to record/reproduce the whole audio data. This standard applies only to the measurement in which input/output data are recorded/reproduced without such missing data. The performance of a PC with missing audio data may be evaluated by the short-term distortion measurement although such evaluation is not within the scope of this standard.