We use Optical Character Recognition (OCR) during our scanning and processing workflow to make the content of each page searchable. You can view the automatically generated text below as well as copy and paste individual pieces of text to quote in your own work.
Text recognition is never 100% accurate. Many parts of the scanned page may not be reflected in the OCR text output, including: images, page layout, certain fonts or handwriting.
8/12/38
GERMANY DISCLOSES DATA ON TELEVISION
To assist in the manufacture of suitable television receiving apparatus the German Post Officers Television Depart¬ ment has made available the exact official data regarding the standard values to be employed in Germany' s new hi gjidefinition television system, which is to open at or after the Radio Exhibition in August, according to the Berlin correspondent of Wo ridRadio.,
"There will be two forms of television broadcasting", he said: "by ultra-short waves from Berlin and from the Feldberg, in the Taunus Mountains (on 45 Meg. for sound and 47.8 Meg. for vision), and from the Brocken (on 40 meg. for sound and 42.8 Meg. for vision). There will also be a system of wired television which will be distributed on a high-frequency carrier over special cables. 'Sound1 on the cables will be transmitted on one of the wire d-wi re less frequencies, whereas 'vision' will be relayed on 3,969 Meg. To make the fullest use of the cable, only one side-band will be transmitted and the carrier may be suppressed. In this manner the cable, which has a band-breadth of 4 meg. can be used: (a) for one 441~lin4 tele¬ vision image, (b) for one 180-line televisiontelephone conver¬ sation, while the frequencies under 1 Meg. remain free for trunk calls.
"For the wired-wireless sytem it has been decided to employ the synchronization signals as in wireless transmission. In this manner receivers for the wired television and the radio television can be identical, since it is necessary only to alter the first-stage amplifier to adapt it to either system.
"The modulation of the German television transmitters is termed 'positive' i.e., the maximum is represented by the whitest spot on the screen, the blackest spot being near the minimum. There is also a * blacker than black' region (this is about one quarter of the total modulation range), which is used for the transmission of the synchronization signals.
"Tests to provide a reliable synchronization signal were carried out during last Winter, and have now been defin¬ itely fixed.
"The vision is standardized at 441 lines, 25 frames, interlaced scanning, 50 frame changes of 220.5 lines a second.
"Discussing these decisions in a paper, Dr. Benneitz, head of the Post Office Television Laboratories, referred to the fact that it is now possible to achieve much higher definition in the laboratory, but that it would take many years before the result of these experiments became ripe for practical and public service. The 441-line definition is considered, in Germany at the moment, the best possible compromise between attainable
6