Videoconferencing Factory Pab Koj Sib Piv Nrog Qhov Sib Tham Siab Ntawm Cov Lus Txhais thiab Txheej Txheem Feem ntau

Videoconferencing koomhaum pab koj sib piv nrog qhov txawv ntawm kev txhais siab thiab tus qauv txhais

Dab tsi rau HD? Nws puas yog ib daim duab tseeb lossis hom ntawv sau? 720p, 1080i, lossis 1080p? Cov kev ntsuas no txawv txav rau cov neeg siv los ua kom txawv nruab nrab ntawm lawv. Nta, ntau cov neeg siv tseem nyob rau theem ntawm cable TV thiab DVD. Lawv tsis paub tias lawv tsuas yog txhawb SD qhov chaw nyob nrog ntau tshaj 500 kab.

Cov neeg tau nyob hauv cov qauv kev txhim kho xyoo kaum ob, tsis hais tias tsuas muaj txog 400 kab ntawm cov qauv txhais, txawm tias videoconferencing kev videoconferencing koob yees duab (520 kab) yog deb qis dua li cov qib HD 720 theem pib, Tsuas yog cov neeg siv high-definition conferencing cameras uas raug nqi ntau pua txhiab nyiaj yog siab nrog cov HD 1080i specifications. Yog li, tam sim no, peb tab tom tham txog lub siab-txhais cov ntsiab lus vim tias qhov chaw tsis txaus ntseeg ntawm cov kev pab cuam, ntawm txoj kab pib poob plawg heev, cia rov qab tuaj lig rau HD. Koj paub, lub hauv paus ntawm kev txhais cov ntsiab lus tau yooj yim txiav tawm ib daim duab, nws yog ib daim duab zoo nkauj. Nws muaj 1,080 kev xa kab, uas yog ob zaug ntawm cov kab xev (480 kab hauv NTSC hom ntawv thiab 576 kab hauv PAL thiab SECAM hom ntawv), ua kom pom zoo, zoo nkauj duab. Cov duab nrog ntse teebmeem yeej qhia tau qhov feem ntawm lub ntsiab lus ntawm lub ntsiab lus.

HD (High Definition) muaj tsib nta piv rau cov tshuaj SD.

1, HD muaj kev ua yuam kev yuam kev loj. Nrog rau txoj kev siv MPEG-2 (los yog codecs) uas siv kev sib txuam nrog kev sib txuam, kev cuam tshuam los ntawm cov ntaub ntawv yuav poob ntau dua cov ntaub ntawv tsis zoo ntawm DV cov qauv. Yog li, qhov yuam kev kho lus ntawm lub kaw lus HDV siv los ua kom muaj kev txhim kho qhov muaj tseeb tshaj qhov DV system. Ntxiv mus, los ntawm kev kho cov kev ua yuam kev DV yuam hauv kev khiav hauv ntau txoj kev yuam kev kho txoj kev, qhov kev hloov kho yuam kev muaj peev xwm ua tau zoo dua, thiab kev ua siab ntev rau cov ntaub ntawv tsis tau zoo heev.

2, HD siv MPEG-2 raws li cov txheej txheem codec compression. Txoj kev MPEG-2 compression rau digital broadcasting thiab DVD kuj siv tau rau HDV. Yuav ncav tau zoo nrawm thaum tuav zoo siab-txhais duab. Yog li, siv tib yam li tus nqi DV tib, kev daws teeb meem loj, txhais tau cov ntaubntawv povthawj siv thiab ua kom tiav. Yuav kom siv MPEG-2 los luam cov ntaub ntawv ntau ntau ntawm cov ntaub ntawv duab, uas yog ntau tshaj li cov ntaub ntawv SD, cov teeb meem loj ntawm cov teeb meem ntxig yuav tsum tau. Txawm li cas los xij, vim yog kev tsim cov semiconductors thiab lub teeb meem siv tshuab, tus compiler tau tam sim no siv los ua tus txheej txheem rau cov khoom siv ntiag tug.

3, HD txhawb ob hom kaw suab. HD txheem muaj ob hom ntawm cov ntaubntawv povthawj tshuab: 720p (progressive) specification thiab 1080i (interlaced) specification.

4, HD zoo nkauj zoo li CD. HD's MPEG-1 Audio Layer II yog siv lub suab sib txuam, koj tso cai rau koj txaus siab nyob ze-CD suab zoo.

HD, qhov qhia tau tias overrides cov tsos 720 × 576 daws teeb meem, nws nce qhov 500-kab yeeb yaj duab video rau 1080 kab daws teeb meem, thiab HD 16: 9 dav-hom hom txhais tau tias nws yuav pom 6 zaug. Cov lus qhia ntawm thawj SD qhov kev pab cuam. 1080i yog ib qho txuj ci thoob ntiaj teb raug lees paub rau digital high definition txhais TV, thiab nws cov duab zoo tshaj ntau tshaj ob zaug ntawm DVD.

Txij li thaum lub tshuab txhais high-txhais yuav sau ntau lab cov tsev neeg nyob rau hauv lub neej yav tom ntej, nws kuj yog ib qho kev dav dav, thiab txhawb nqa cov khoom lag luam yuav tsum yog debut. Video conferencing koob yees duab, high-definition video capture phaib thiab yog li ntawm tag nrho cov kev tuaj yeem tsim. Lub rooj txhawb siab lub koob yees duab tau lees tias "qhabnias" thiab tsis thuam cov duab zoo thaum ua si video. Raws li tus txheej txheem no, cov duab thaij duab yuav raug kaw hauv DV kab xev, thiab lub suab zoo zoo dua.