QAM of the most advanced dial-up modem151 (6/10/2008 4:20:48 AM) comp.dsp Hi: The most advanced dial-up modem [V.92] uses QAM [a mixture of amplitude and phase modulation]. Does this modem use more phases or more amplitudes to convey data? For the same amount of bits-per-baud, if... Green
Disadvantages of *extreme* MPSK?1245 (6/5/2008 6:39:45 AM) comp.dsp Hi: In the hypothetical situation I describe, dial-up modem telecommunications technology devices use extreme MPSK [Multiple Phase Shift Keying] as the modulation scheme. This too-good-to-be-true MPSK uses ... Green
Linear PCM video; specs?140 (6/1/2008 5:14:36 AM) comp.dsp Hi: What are the specs of uncompressed linear PCM video? The specs of uncompressed linear PCM audio are bit-rate, sample-rate, bit-resolution, and number of channels [1 if mono, 2 if stereo] In LPCM audio, ... Green
Does an inadequate pixel-density cause spatial aliasing?1248 (5/25/2008 4:01:24 AM) comp.dsp Hi: Is spatial aliasing caused by an insufficient pixel-density? Also, some video websites say that spatial aliasing causes jaggies, other say it causes the Moire effect, still others say it causes pixelati... Green
QAM; 1-amplitude, many phases, 1-baud, 1 gigabit-per-baud541 (5/18/2008 6:01:41 PM) comp.dsp Eric Jacobsen wrote in http://groups.google.com/group/comp.dsp/msg/dc369177d865440e : > On Sat, 17 May 2008 15:55:02 -0700, "Green Xenon [Radium]" > wrote: >> Let's say I am using QAM and want a baud-r... Green
Modulation scheme with multiple phases and a two amplitudes?2234 (5/16/2008 4:56:05 AM) comp.dsp Hi: QAM uses two carrier waves that are 90-degrees out of phases with each each and amplitude-modulates them. QAM only has two phases but can have more than two amplitude levels. Is there any modulation sche... Green
What's the use of a 192 kHz sample rate?23494 (5/3/2008 4:41:34 AM) comp.dsp Hi: Why does DVD-Audio use 192 kHz sample rate? What's the advantage over 44.1 kHz? Humans can't hear the full range of a 192 kHz sample rate? On average, what is the minimum sample rate for a guy in his ear... Green
Is 44.1 KHz sample-rate enough to cover the entire human hearing range?2537 (5/3/2008 1:17:43 AM) comp.dsp They say no: http://www.allexperts.com/user.cgi?m=6&catID=835&qID=4743184 http://www.allexperts.com/user.cgi?m=6&catID=835&qID=4742942 They say Yes: http://www.allexperts.com/user.cgi?m=6&catID=835&qID=4742... Green
Disadvantages of using AM for DSSS/FHSS?2053 (4/28/2008 9:26:35 PM) comp.dsp Hi: Most cell phones and wireless internet routers, modems, and access points that use spread spectrum usually broadcast and receive their data on FM-radio waves. Just out of curiosity, I ask, why not use AM... glucegen1(225)
What's the use of a 192 kHz sample rate?23494 (5/3/2008 4:41:34 AM) comp.dsp Hi: Why does DVD-Audio use 192 kHz sample rate? What's the advantage over 44.1 kHz? Humans can't hear the full range of a 192 kHz sample rate? On average, what is the minimum sample rate for a guy in his ear... glucegen1(225)
Modulation scheme with multiple phases and a two amplitudes?2234 (5/16/2008 4:56:05 AM) comp.dsp Hi: QAM uses two carrier waves that are 90-degrees out of phases with each each and amplitude-modulates them. QAM only has two phases but can have more than two amplitude levels. Is there any modulation sche... glucegen1(225)
QAM; 1-amplitude, many phases, 1-baud, 1 gigabit-per-baud541 (5/18/2008 6:01:41 PM) comp.dsp Eric Jacobsen wrote in http://groups.google.com/group/comp.dsp/msg/dc369177d865440e : > On Sat, 17 May 2008 15:55:02 -0700, "Green Xenon [Radium]" > wrote: >> Let's say I am using QAM and want a baud-r... glucegen1(225)
Does an inadequate pixel-density cause spatial aliasing?1248 (5/25/2008 4:01:24 AM) comp.dsp Hi: Is spatial aliasing caused by an insufficient pixel-density? Also, some video websites say that spatial aliasing causes jaggies, other say it causes the Moire effect, still others say it causes pixelati... glucegen1(225)
Disadvantages of *extreme* MPSK?1245 (6/5/2008 6:39:45 AM) comp.dsp Hi: In the hypothetical situation I describe, dial-up modem telecommunications technology devices use extreme MPSK [Multiple Phase Shift Keying] as the modulation scheme. This too-good-to-be-true MPSK uses ... glucegen1(225)