초록 ▼

The digital interpolator herein selectively provides linear interpolation between successive digital data words in a stream of such data words. The data words each contain a control bit together with first and second multi-bit fields with the control bit having a first or second level respectively d

The digital interpolator herein selectively provides linear interpolation between successive digital data words in a stream of such data words. The data words each contain a control bit together with first and second multi-bit fields with the control bit having a first or second level respectively designating whether or not interpolation is to take place through that data word. The first bit field contains differential data, representing the value between successive data words, only when the control bit is at a first level. The second bit field contains the interpolation interval to be effective when the control bit is at the second level. When no interpolation through the assigned data point is desired, the control bit is at the first level and the circuitry responds to provide an output signal having a digital value corresponding with a first data word to which there is added the differential data from the first bit field to obtain the next output signal. If interpolation is desired through the assigned data word, then the circuitry responds by repeatedly adding interpolation increment from the second field to the previous output signal for N iterations representing N interpolation increments.

대표청구항 ▼

A digital interpolator for selectively providing or not providing linear interpolation between successive digital data words, each representing a function point, in a stream of such data words, comprising: means for supplying a stream of successive data words, each said data word being a multi-bit w

A digital interpolator for selectively providing or not providing linear interpolation between successive digital data words, each representing a function point, in a stream of such data words, comprising: means for supplying a stream of successive data words, each said data word being a multi-bit word having a control bit designating whether or not interpolation is to take place through that data word, a first bit field containing incremental data representing the value of an interpolation increment to be employed during interpolation when said control bit is at a first level, and a second bit field containing differential data representing the value between successive function points only when the control bit is at a second level indicative of no interpolation through the data word; output means for providing a first multi-bit digital output signal having a value initially corresponding with a first of said successive data words; means responsive to a second succeeding said data word for determining whether said control bit therein is at said first level or said second level for combining said differential data to said multi-bit output signal to generate the next said output signal, when said control bit is at said second level, so as to have a value corresponding with said first output signal plus said differential value or for repeatedly combining said interpolation increment over an interpolation interval to said first output signal, when said control bit is at said first level, until the value thereof corresponds with that of said second of said successive data words.