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ID number:415829
Evaluation:
Published: 28.09.2018.
Language: Latvian
Level: Elementary school
Literature: 4 units
References: Not used
Extract

Pirmais raidītājs
Latvijas pirmo televīzijas raidītāju uzbūvēja Philips fabrikā (attēls tika veidots ar mehāniskās televīzijas pamatelementu Nipkova disku 45 rindās, ar 12,5 attēlu maiņām sekundē. Sekundē raidīto punktu skaits 28.000. Nesējviļņa garums ap 80 m. Raidītājs izstaroja apm. 30 kc/s platu frekvenču spektru).

Ciparu televīzija
Ciparu jeb digitālā televīzija ir televīzija, kur video pārraida MPEG2, MPEG4 vai citādi kodētas ciparu straumes veidā. Ciparu signālu var izplatīt kabeļtīklos, no pavadoņa (ciparu pavadoņtelevīzija), vai arī ar parasto TV raidīšanas aparatūru (ciparu virszemes televīzija).

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