Sep 17th, 2011, 10:40 | 只看该作者 #45 | |
软件基本靠载 硬件基本靠拆
注册日期: Jul 2004
住址: GTA
帖子: 13,253
积分:52
精华:18
声望: 3174223
|
引用:
【转贴】: 预加重和去加重 语音和图像信号低频段能量大,高频段信号能量明显小;而鉴频器输出噪声的功率谱密度随频率的平方而增加(低频噪声小,高频噪声大),造成信号的低频信噪比很大,而高频信噪比明显不足,使高频传输困难。 Pre-emphasis In processing electronic audio signals, pre-emphasis refers to a system process designed to increase (within a frequency band) the magnitude of some (usually higher) frequencies with respect to the magnitude of other (usually lower) frequencies in order to improve the overall signal-to-noise ratio by minimizing the adverse effects of such phenomena as attenuation distortion or saturation of recording media in subsequent parts of the system. That is the mirror of the deemphasis. The whole system is called emphasis. The frequency curve is decided by special time constants. The cutoff frequency can be calculated from that value. Pre-emphasis is commonly used in telecommunications, digital audio recording, record cutting, in FM broadcasting transmissions, and in displaying the spectrograms of speech signals. An example of this is the RIAA equalization curve on 33 rpm and 45 rpm vinyl records. In high speed digital transmission, pre-emphasis is used to improve signal quality at the output of a data transmission. In transmitting signals at high data rates, the transmission medium may introduce distortions, so pre-emphasis is used to distort the transmitted signal to correct for this distortion. When done properly this produces a received signal which more closely resembles the original or desired signal, allowing the use of higher frequencies or producing fewer bit errors. |
|
|
Sep 17th, 2011, 14:54 | 只看该作者 #53 |
Senior Member
注册日期: Jan 2008
帖子: 1,974
积分:11
精华:4
声望: 1172365
|
I bite the bullet!! 这个 http://www.musicdirect.com/p-2662-vp...t-2-jmw-9.aspx 还有这个 http://www.soundstage.com/vinyl/vinyl200506.htm Lighting, 禁止你再说黑胶坏话了!! |
------------------------------- You Cannot Be Serious! |
|
|
感谢 hugoo 此篇文章之用户: |
老广 (Sep 17th, 2011) |
Sep 17th, 2011, 15:04 | 只看该作者 #54 | |
Senior Member
注册日期: Aug 2010
帖子: 1,485
积分:30
精华:7
声望: 64837
|
引用:
靠!我正在家里做着production implementation。我实在不应该上网。被你害到心七上八下了。。。 |
|
|
Sep 17th, 2011, 19:35 | 只看该作者 #57 | |
别当真
|
引用:
在此声明,我也是喜欢黑胶的。 只是提出疑问,似乎各位大侠也和我一样,只知美女漂亮,却不知为何漂亮。 看了你的链接评论:was the crystalline clarity of the air and the way everything looked: crisp, almost surreal, with perfectly delineated details. 这种评论用在电脑音乐上,似乎也确切吧?或者更像枪手写的。 你还是没有提供具有杀伤力的论点说服我!我会继续提出疑问,在各位黑胶FANS 看来,那就是坏话了。 |
|
|
Sep 17th, 2011, 19:55 | 只看该作者 #58 | |
别当真
|
引用:
这就像我,哪位说电脑音乐坏话,我就回敬 “是因为他不懂怎么玩电脑!!!” 在你说喜欢黑胶以前,我就料到你一定会喜欢黑胶,因为它的临场感,共鸣感, 泛音,及丰富音色,音调的变化的原因, 对喜欢爵士的你来说,就像为你量身定做般,你不喜欢还有谁能喜欢? 但对于我来说,像黑胶,tube 这种具有很重个性的音色来说,不适合我喜欢直白的个性,所以我更喜欢电脑音乐,然后才是黑胶,对我来说 SACD 也属电脑音乐一类,都是属于HiFi 一类。 不过,我以上提的各种黑胶的疑问,你可是一个也没回答我,这不应该是“爱”她的表现,“爱”她,也应懂她,是不是?虽然“爱”总是盲目的! |
|
|