# What is bit pair recording?

## What is bit pair recording?

Bit-pair recoding is the product of the multiplier results in using at most one summand for each pair of bits in the multiplier. It is derived directly from the Booth algorithm. Grouping the Booth-recoded multiplier bits in pairs will decrease the multiplication only by summands.

**What are the advantages and disadvantages of Booth’s multiplication?**

One advantage of the Booth multiplier is, it reduce the number of partial product, thus make it extensively used in multiplier with long operands (>16 bits) [7]. The main disadvantage of Booth multiplier is the complexity of the circuit to generate a partial product bit in the Booth encoding [9].

**What is meant by bit pair recoding give an example?**

What is bit pair recoding? Give an example. Bit pair recoding halves the maximum number of summands. Group the Booth-recoded multiplier bits in pairs and observe the following: The pair (+1 -1) is equivalent to the pair (0 +1).

### What are the main features of Booth’s algorithm?

The booth algorithm is a multiplication algorithm that allows us to multiply the two signed binary integers in 2’s complement, respectively….Working on the Booth Algorithm

- Set the Multiplicand and Multiplier binary bits as M and Q, respectively.
- Initially, we set the AC and Qn + 1 registers value to 0.

**What reduces the number of summands by a factor of 2?**

Explanation: Among the four options given in question statement, the correct option is Bit pair recording.

**What are the disadvantages of Booth’s algorithm?**

Two main drawbacks of Booth Algorithm are the inefficiency of the circuit when isolated 1’s are encountered and difficulty in designing parallel multipliers as number of shift-and-add operations vary.

## What is Booth’s algorithm Why do we need this draw the flowchart of Booth’s algorithm?

Booth’s algorithm is a powerful algorithm that is used for signed multiplication. It generates a 2n bit product for two n bit signed numbers. The flowchart is as shown in Figure 1. 3) Repeat step 2 till count does not equal 0.

**Which method is used to reduce the maximum number of summands by half?**

Discussion Forum

Que. | The method used to reduce the maximum number of summands by half is _______. |
---|---|

b. | Bit-pair recording |

c. | Quick multiplication |

d. | None of the above |

Answer:Bit-pair recording |