Esikhathini sethu, ukuphepha okuphelele akunakwenzeka ngaphandle kwesistimu yokuphepha kanye nesistimu yokuqapha ividiyo . Abaningi bangathanda ukufaka ama-camera cameras ukulandelela okwenzekayo ekhaya. Nokho, ngaphandle kwe-DVR yendlu, lokhu akukwenziwanga.
Iyini i-DVR?
I-DVR iyinhlangano ehambisanayo erekhoda, egcina futhi edlala ulwazi lwevidiyo. Le divayisi ye-elekthronikhi iyinxenye esemqoka yesistimu yokuqapha ividiyo. I-DVR, kanye nekhompiyutha , iqukethe i-disk eyinkimbinkimbi, iprosesa, ne-ADC. Kwamanye amodeli athuthukile, ngisho nesistimu yokusebenza ekhethekile ifakiwe.
Ungakhetha kanjani i-DVR ekhaya?
Imakethe yanamuhla inikeza amadivaysi ahlukahlukene okubukwa kwevidiyo. Kodwa ukusetshenziswa kwekhaya kuyinto efiselekayo ukukhetha imodeli ngemisebenzi enhle kanye nezindleko ezincane. Uma ukhetha i-DVR, kubalulekile ukunaka imingcele enjalo njengezinombolo zeziteshi, ikhwalithi yokurekhoda, kanye nokusebenza.
Ngaphambi kokuthenga, udinga ukunquma inani lamakhamera ofuna ukuxhuma ku-DVR. Ngokuya ngalokhu, amadivaysi eyodwa, amane, ayisishiyagalombili, ayisishiyagalolunye, ayishumi nambili-wesiteshi anikezwe.
Enye yezinto ezibalulekile lapho ukhetha i-DVR yikhwalithi yokurekhoda, okuyisisekelo, esinqumayo ukubaluleka nokwaziswa kwe-system yonke yokuhlola ividiyo. Isinqumo esiphezulu singacatshangwa njenge-D1 (720x576 pixels) ne-HD1 (amaphikseli angu-720x288). Noma kunjalo, ngaphezu kwalokhu, kubalulekile ukuqhathanisa nesinqumo ngejubane lokurekhoda, inani eliphakeme elifinyelela kumafremu angu-25 ngomzuzwana. Idatha etholakele kusuka kumakhamera wevidiyo isetshenziswe ngendlela ethize - MPEG4, MJPEG noma H.264. Ifomu lokugcina libhekwa njengelona lwanamuhla.
Ukusebenza kwe-DVR akubalulekile nakancane. Idivayisi kufanele ibe nevidiyo ephumayo (BNC, VGA, HDMI noma i-SPOT), okufakwayo komsindo wokuqopha umsindo (uma kunesidingo), isikhombimsebenzisi sokuphatha, ukufinyelela kwinethiwekhi.
Kunezinguqulo ezihlukahlukene zedivayisi. Isibonelo, i-DVR ene-home monitor ayidingi ukuxhumeka kuyo