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audio channels, stereo and mono. mono has one track. stereo had 2 (L and R). CD contains stereo channels. |
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Number of samples per second. 8,000 Hz - 96,000 Hz. CD is 44,100 Hz. |
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accuracy at which sound is samples: 8, 16, 24 bit. CD is 16 bit. |
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refers to the ratio of the video width to length. TV 4:3, Widescreen 16:9, DV 3:2 |
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Color Depth (aka bit depth, pixel depth) |
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max. amount of color possible-- higher bit depth larger size |
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number of frames per second. smaller fps but more jerky. full motion 25-30 fps, web 10-15fps+ |
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static frame in video -- fewer keyframes reduce data rate reduce quality |
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requirements for viewing time based media |
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right software, right codec, processing power, bandwith |
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44.1 kHz, 96 kHz, 192 kHz-- high rates reproduce sound more accurately |
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16-bit - CD, 20-bit, 24-bit- DVD-- greater dynamic range |
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Pulse Code Modulation (PCM) as the capture/ encoding method; saved as WAV or AIFF |
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44.1 spoken, 96 nature sounds |
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Characteristics of Analog Video |
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1) dynamic range of sound, 1 audio signal 3 video signals 2) Frame Rate 3) Aspect Ration |
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Sample at 12-14 bits per video color channel (36-40 bits) and 24-bit for audio channels-- all digital formats compressed at this point -- motion JPEG 2000 may become standard |
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archival formats migration video |
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digibeta replacing Betacam SP-- for lower resolution born digital materials |
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D5- 4:1 comprssion, D6- Uncompressed, HD Cam- 8:1 compression |
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open source, lossless compression, compression ratios 1.5 tp 3:1 can be paired with MSF metadata schema |
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cd quality, compression ration 10:1, 32,000, 44,100, 48,000 HZ, can be streamed |
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Audio Interchange Format, not compressed, cannot be streamed |
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600 DPI bitonal (300 DPI grayscale deteriorating) |
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600 DPI bitonal (300-400 DPI grayscale) |
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600 DPI bitonal 1.5 screening rule |
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300 DPI min- bitonal, grayscale, color based on legibility requirement. Paprri 600 DPI, 24 bit |
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8 bit grayscale min 300 DPI |
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MTF (modulation transfer function) -- detail & resolution |
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