# Megabits

## Introduction

Incomputerscience,bitisthesmallestunitofinformation,calledbinarybit;itisgenerallyrepresentedby0and1.Byteiscalledabyte,abyteiscomposedof8bits(bit),whichisusedtorepresentacharacterinacomputer.ConversionbetweenbitandByteispossible,andtheconversionrelationshipis:1Byte=8bit(orabbreviatedas:1B=8b);inpracticalapplications,itisgenerallyabbreviated,thatis,1bitisabbreviatedas1b(notethatthelowercaseEnglishletterb),1ByteAbbreviatedas1B(notetheuppercaseEnglishletterB).

1MB=1024KB=1048576B(Bisbyte,Byte)

So1Mbps(1megabitpersecond)=0.125MByte/s(0.125megabytespersecond)=0.125MByte/s*1024=128KB/s(128kilobytespersecond)

Thatis1Mbps(megabitspersecond)=1/8MB/s(one-eighthofamegabytepersecond)Seconds)

## Application

### Overview

128KB/s=128×8(Kb/s)=1024Kb/s=1Mb/s,thatis,128KB/s=1Mb/s.

### Conversionformula

Itisrecommendedthatusersrememberthefollowingconversionformula:

1B=8b1B/s=8b/s(or1Bps=8bps)

1KB=1024B1KB/s=1024B/s

1MB=1024KB1MB/s=1024KB/s

Writingstandard:Intheactualwritingstandard,BshouldmeanByte(Byte),bshouldrepresentbit(bit),butinordinaryactualwriting,bothbitandBytearemixedasb.Forexample,bothMb/sandMB/saremixedasMb/s,causingpeopleIntheactualcalculation,errorsoccurredduetotheconfusionoftheunits.

## Therelationshipbetweenmegabitsandbits(experimentalproof)

1Mb=106b(bit)

Theexperimentalproofisasfollows:

[Thinking]Iusemyvoicerecordertodoexperiments,recordatacertainkilobitrate(1536kbpsIuse),andthenlookattheremainingrecordablerecordingtimeandremainingdiskspacedisplayedonthevoicerecorder.Becausetheformerisbasedonkilobitrate,thelatterisbasedonkilobytes,andtheconversionofkilobytestobytes,andbytestobitsisnotdisputed(1kB=1024B,1B=8b),soyoucanUsedforexperimentation.[Note:Strictlyspeaking,1MiB=1024KiB,1KiB=1024B,1B=8bit(bitmeansbit,bit,abbreviatedasb)butweareusedtoomittingi.Inthediskcalculation,1GB=1000MBisactuallycorrect.Infact1GiBisequalto1024MiB,butthisisnottheobjectofourdiscussion]

[Recorddata]

Startrecordingat1536kbps,andthesystemdisplaystheremainingrecordingtimeof100Itstopsathours(ie360000s),andinsertingWindowsshowsthattheremainingdiskspaceisequalto65919MB,thatis,67501056KB

[AssumptionsandAnalysis]