Home |
Search |
Today's Posts |
#1
Posted to sci.electronics.basics,rec.video.desktop,comp.dsp,rec.audio.tech,rec.photo.digital
|
|||
|
|||
Questions about equivalents of audio/video and digital/analog.
Hi:
I. Audio vs. Video Digitized (mono) audio has a single sample per each sampling interval. In the case of digital video, we could treat each individual sample point location in the sampling grid (each pixel position in a frame) the same way as if it was a sample from an individual (mono) audio signal that continues on the same position in the next frame. For example, a 640×480 pixel video stream shot at 30 fps would be treated mathematically as if it consisted of 307200 parallel, individual mono audio streams [channels] at a 30 Hz sample rate. Where does bit- resolution enter the equation? Digital linear PCM audio has the following components: 1. Sample rate [44.1 KHz for CD audio] 2. Channels [2 in stereo, 1 in monaural] 3. Bit-resolution [16-bit for CD audio] Sample rate in audio = frame rate in video Channel in audio = pixel in video Bit-resolution in audio = ? in video Is it true that unlike the-frequency-of-audio, the-frequency-of-video has two components -- temporal and spatial? AFAIK, the-frequency-of-audio only has a temporal component. Do I guess right? II. Digital vs. Analog Sample-rate is a digital entity. In a digital audio device, the sample- rate must be at least 2x the highest intended frequency of the digital audio signal. What is the analog-equivalent of sample-rate? In an analog audio device, does this equivalent need to be at least 2x the highest intended frequency of the analog audio signal? If not, then what is the minimum frequency that the analog-equivalent-of-sample- rate must be in relation to the analog audio signal? III. My Requests: No offense but please respond with reasonable answers & keep out the jokes, off-topic nonsense, taunts, insults, and trivializations. I am really interested in this. Thanks for your assistance, cooperation, and understanding, Radium |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
Digital vs. Analog; the word from Danish Pro Audio | Audio Opinions | |||
Digital vs. Analog; the word from Danish Pro Audio | Audio Opinions | |||
Novice question: how transfer analog audio to digital? | Pro Audio | |||
recording from digital and analog audio to computer for editing | Pro Audio | |||
Post Audio: Analog or Digital? | Pro Audio |