Term
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Definition
| Converting analog signal into a series of 0s and 1s. |
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Term
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Definition
| Signals in which information is sent using discrete values (rather than continuous). (Noncontinuous time which results in discrete time samples. |
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Term
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Definition
Less noise
Compression
Can incorporate error correction techniques
Can maximize efficiency by minimizing bits |
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Term
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Definition
A/D
*Sampling
*Quantizing
*Binary Coding (for PCM)
Transmitting Digital Signals
*multiplexing
Digital to Analog - D/A |
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Term
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Definition
| Instantaneous Amplititudes at fixed points in time |
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Term
| Sampling Rate and Precision |
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Definition
If sampling rate is 1000 per second, precision is 10.
If sampling rate is 2000 per second, precision is 20.
If sampling rate is 4000 per second, precision is 40 |
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Term
| Sampling Rate, Precision, and Data |
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Definition
| If you double the sampling rate and double the precision, you have four times more data. |
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Term
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Definition
44.1 KHz sampling
2 bytes (16 bits) of precision: 65,536 gradations
Stereo: two channels
Up to 74 minutes in length
44,100 samples/(channel*second)* 2 bytes/sample * 2 channels * 74 minutes * 60 seconds/minute = 783,216,000 bytes (783.216 MB)
CD is 700 MB |
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Term
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Definition
At least two samples per cycle.
Max Frequency is 5 kHz (that is 5000 cycles per second). If you sample twice per cycle that is 10,000 samples per second. |
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Term
Pulse Modulation
AKA Pulse (Digital) Modulation |
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Definition
| Once a waveform has been sampled, the samples must be encoded so they can be multiplexed. |
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Term
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Definition
Parameter is the existence of a pulse.
No pulse = 0
Pulse = 1 |
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Term
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Definition
| Chopping things vertically (like vertical sampling) and assigning them to a specific levels. |
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Term
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Definition
| Assigning a binary to the quatization values (based on a protocol). Level X = binary y |
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Term
| Number of Pulses and Levels |
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Definition
x(n)
where x is the number of bits
n is the number of levels |
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Term
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Definition
Quantized Value is 553.
5 in binary is 101
5 in binary is 101
3 in binary is 011 |
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