Advance in Television

Poverty Bay Herald, Volume LXI, Issue 18399, 17 May 1934, Page 10

Advance in Television

QAPTAIN A, G. D. West, technical director of the Baird Television Company, and formerly assistant chief engineer of the gave the London Daily Telegraph t'ho first details, on March 22, of the improved methods whereby the company hud been able to "televise” tho figure of the chairman, speaking at tho Crystal Palace, to tho shareholders’ meeting in Wardour street, Loudon. He emphasised that tho transmission was effected by wireless and not by land-line. It was carried on two ultra-short wave-lengths of G and 0,5 metres, carrying vision and speech respectively. . The "picture” is made up of ISO strips or lines, compared with tho 30 lines used for the present 8.8. C. transmissions. This means an immense improvement in detail—an increase in the number of "picture points” from 2000 to 48,000. One of the difficulties in the development of television has been the enormous wave-length "sjprend” demanded by a transmission giving good detail. An ordinary broadcasting station is allowed elbow-room of 9000 cycles, and if it exceeds this allowance, interference is likely. The 180-lino television transmission, howovor, requires a "spread" of a million cycles. There is plenty of accommodation on the 6-inetre wave, but its short range and the vngaries of reception have hitherto been con-, sitlercd obstacles to its use. j

The home receiver which the company proposes to market gives a picture lOin. by Bin. One of the secrets of its success is improved aerial arrangements.