Abstract
IN connexion with the high-definition television transmissions which will be radiated from the Alexandra Palace, the British Broadcasting Corporation has requested Baird Television, Ltd., and Marconi-E.M.I. Television Co., Ltd., to send to manufacturers a complete specification of the waveform which they will radiate in their television transmissions from the palace. We have received from each of the companies their specifications, which are highly technical and will be mainly of interest to manufacturers. The ratio of the horizontal to the vertical breadth of the pictures is four to three for the Baird transmissions and five to four for the E.M.I, transmissions. The latter system transmits 25 complete pictures per second each of 405 total lines. These lines are ‘interlaced’ so that the frame and flicker frequency is 50 per second. It is claimed that good pictures can be received, although only a fraction of the radiated band is used; but the greater the width of the transmitted band utilised the better the received picture.
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High-Definition Television Transmission. Nature 136, 579 (1935). https://doi.org/10.1038/136579a0
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DOI: https://doi.org/10.1038/136579a0