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What is 7-bit code?

Updated: 8/11/2023
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9y ago

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7-bit code is an encoding scheme that uses just 7 bits. 7-bit encoding allows positive values in the range 0 through 127. ANSI is a 7-bit encoding scheme. When used on an 8-bit system, bit 7 is always zero (where bit 0 is always the least significant bit). Bit 7 is used by the ASCII extended character set, where the first 127 characters are the same as those defined by the ANSI character set.

7-bit encoding was often used in early tele-printing where bit 7 was not needed. In this way, they could encode eight 7-bit characters into a 56-bit package which could be transmitted and decoded by the 7-bit teleprinter -- the idea being that the fewer bits you transmit, the quicker it will be to send the data across a telephone line.

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10y ago

A 6-bit code is a system using six binary bits per character (letter, number, or symbol). That allows for a total of 64 possible characters.

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