Tshaj Cuam Tshuam Control - Dynamic Range, Compression, thiab Headroom
Muaj ntau yam yuav nkag mus rau hauv lub suab nrov hauv ib lub suab paj nruag lossis tsev ua yeeb yam hauv tsev. Kev tswj lub ntim yog qhov tseem ceeb tshaj plaws uas feem ntau pom zoo mloog, tab sis nws tsis tuaj yeem ua txhua txoj haujlwm. Kev kho lub cuab lub yig, qhov sib txawv ntawm qhov sib txawv, thiab kev tawm dag zog yog cov yam ntxwv ntxiv uas yuav pab txhawb mloog kev nplij siab.
Lub Npe Hluav Taws Xob-Yog Ntxiv Lub Hwj Huam Muaj Thaum Koj Xav Tau Kev Pab?
Rau chav-teev suab, ib lub tso suab lossis tsev ua yeeb yam hauv tsev yuav tsum muab tso tawm kom txaus rau koj cov neeg tham kom koj thiaj li hnov cov ntsiab lus. Txawm li cas los xij, txij li lub suab nrov tas li hloov suab paj nruag thiab cov yeeb yaj kiab, tus neeg tuaj yeem yuav tsum kho nws cov hluav taws xob tawm sai sai.
Dynamic headroom yog hais txog kev muaj peev xwm ntawm ib lub tshav puam hauv tsev / tsev ua yeeb yam, los sis siv zog, los tso zis hluav taws xob rau lub sij hawm luv luv kom haum rau cov suab paj nruag peaks los yog suab nrov heev hauv cov yeeb yaj kiab. Qhov no yog qhov tseem ceeb hauv chav tsev ua yeeb yam, qhov twg yog qhov txawv huab hloov thaum lub sijhawm ua yeeb yam.
Lub tshuab hluav taws xob yog ntsuas hauv Decibels (dB) . Yog hais tias ib tus txais / amplifier muaj rab peev xwm los muab nws lub zog tso zis hluav taws xob rau lub sij hawm luv luv kom haum qhov ntim qhov siab, nws muaj 3db ntawm lub hau hluav taws xob. Txawm li cas los xij, doubling zog tso zis tsis txhais tias doubling lub ntim. Yuav kom muab ob npaug ntawm qhov taw tes, ib tus txais / amplifier yuav tsum ua kom nws cov zog tso tawm los ntawm ib yam ntawm 10.
Qhov no txhais tau hais tias yog tias ib tug txais / amplifier tawm tshaj tawm 10 watts ntawm ib qho kev taw qhia thiab yuav cia li hloov hauv cov soundtrack yuav tsum muab ob npaug rau qhov ntim rau ib nyuag lub sij hawm, tus amplifier / receiver yuav tsum tau tso tawm sai 100 watts.
Lub peev xim ntawm lub taub hau yog ci rau hauv qhov cuab yeej ntawm lub receiver lossis amplifier, thiab tsis tuaj yeem hloov kho. Qhov zoo tshaj plaws, ib qho chaw ua yeeb yam hauv tsev uas muaj tsawg kawg yog 3db lossis ntau tshaj ntawm lub hau phaj yog qhov koj xav tau. Qhov no kuj tuaj yeem yog kev qhia los ntawm ib tus neeg tau txais kev tso tawm qhov ntsuas qhov muaj zog-piv txwv li, yog lub ncov, los yog dynamic, qhov hluav taws xob qhov ntsuam xyuas tus nqi yog ob npaug ntawm qhov teev los yog ntsuas RMS, Nruam, los yog FTC fais fab kev ntsuas, qhov no yuav yog kwv yees li ntawm 3db dynamic lub taub hau.
Yog hais tias koj tsis paub nrog lub hwj chim ua haujlwm li cas, xyuas seb peb tsab xov xwm li cas rau qhov fais fab amplifier koom nrog kev ua tau zoo .
Dynamic Khwv-Mos Zoo Siab
Nyob hauv suab, qhov txawv ntawm qhov sib txawv yog qhov sib txawv ntawm qhov nrov tshaj plaws uas tsis tau hloov lub suab ua rau hauv nruab nrab ntawm lub suab softest uas tseem hnov. 1dB yog qhov tsawg tshaj plaws qhov sib txawv uas ib tug tib neeg pob ntseg tuaj yeem pom. Qhov txawv nruab nrab ntawm lub ntxhi thiab lub pob zeb hu nkauj (ntawm tib lub nrug ntawm koj pob ntseg) yog li 100dB.
Qhov no txhais tau hais tias siv lub dB scale, pob zeb kev hais kwv txhiaj yog 10 npaug ntawm lub npaug tshaj li ntxhi. Rau cov suab paj nruag kaw, tus txheem CD yeej muaj peev xwm ntawm kev ua tau 100db ntawm ntau qhov kev sib txawv, thaum LP cov ntaub ntawv tshaj tawm ntawm 70db.
Lub chaw ua yeeb yam, lub tsev ua yeeb yam hauv tsev, thiab cov cua ntses uas tuaj yeem tsim muaj ntau yam ntawm CD lossis lwm qhov chaw uas muaj peev xwm tsim tau ib qho dav dav npaum li cas yog qhov tseem ceeb heev.
Tau kawg, muaj ib qho teeb meem nrog cov ntsiab lus uas tau muab teev cia nrog rau ntau lub suab sib txawv uas yog qhov "nrug" nruab nrab ntawm cov kev sib tw siab tshaj plaws thiab siab tshaj plaws tuaj yeem ua kom meem txom.
Piv txwv, nyob hauv cov suab paj nruag tsis zoo, muaj suab nrov tshwm sim los ntawm cov twj paj nruag keeb kwm yav dhau los thiab cov yeeb yaj kiab, qhov kev sib tham yuav yog mos muag kom pom tau yooj yim, thaum suab nrov tshwj xeeb yuav tsis yooj yim dua koj, tiam sis koj cov neeg zej zog.
Qhov no yog qhov twg Dynamic Compression los hauv.
Dynamic Compression-Cia li muab Dynamic Range
Dynamic compression tsis hais txog hom kev ywj pheej uas siv hauv cov suab (xav MP3). Xwb, kev ywj pheej dynamic yog lub cuab tam uas tso cai rau tus mloog kom hloov txoj kev sib raug zoo ntawm qhov nrov tshaj plaws ntawm qhov soundtrack thiab qhov sib txuam ntawm cov soundtrack thaum koj ua si CD, DVD, Blu-Ray Disc, los yog lwm cov suab paj nruag hom ntawv.
Piv txwv li, yog tias koj pom tias qhov tawg lossis lwm yam ntawm lub suab nrov nrov nrov thiab kev sib tham yog mos heev, koj yuav xav kom nqaim dynamic qhov tam sim no hauv lub suab nrov. Ua li ntawd yuav ua rau lub suab nrov ntawm qhov kev tawg tsis heev li nrov, tab sis qhov kev sib txuas lus yuav ua suab nrov dua. Qhov no yuav ua rau lub suab tag nrho ntau dua, uas yog qhov tshwj xeeb tshaj yog thaum siv CD, DVD, lossis Blu-Ray Disc ntawm ntim tsawg.
Hauv tsev ua yeeb yam hauv tsev los yog cov khoom siv zoo sib xws, qhov sib txig ntawm txoj kev tawm dag zog yog kho siv lub chaw tswj uas teev tias muaj kev tawm dag zog, dynamic range, los sis DRC cias.
Zoo li lub npe ntawm lub npe dynamic compression tswj tshuab xws li DTS TruVolume, Dolby Volume, Zvox Accuvoice, thiab Audyssey Dynamic Volume. Tsis tas li ntawd, qee qhov sib txawv ntawm ntau qhov sib txawv / compression kev xaiv tau ua haujlwm nyob sib txawv (xws li thaum hloov raws hauv TV kom tag nrho cov kev nyob ntawm tib theem ntim, los yog ua kom cov lag luam hauv lub TV program).
Lub Kab Hauv Qab
Kev kho lub cuab lub yig, qhov txawv ntawm qhov sib txawv, thiab qhov sib txuam dynamic yog qhov tseem ceeb tshaj plaws uas cuam tshuam rau ntau yam ntawm lub suab ntim muaj nyob rau hauv kev mloog lus. Yog tias kho cov theem no tsis kho cov teeb meem uas koj muaj, xav saib ua lwm yam xws li distortion thiab chav acoustics .