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The choice of a color television standard will increasmay have a uniform line frequency in all areas. This ingly affect both the broadcasting authorities and the was one of the fortunate provisions of CCIR's television public in most countries of the world. Although there are planning some 15 years ago. A common line frequency considerable differences of opinion about what should greatly simplifies many aspects of the problems of probe done, those countries that have already reached a gram exchange.decision are very fortunate to be spared much of the Program exchange in the future is much more likely to heart-searching taking place in those countries that have be on video tape than on film, and so three conversion not yet done so. In Europe, work on these problems is in problems will exist: (1) changing the field frequency; full swing; in fact, several countries already have an-(2) changing the line frequency-a problem largely nounced plans for the start of regular color service in the solved by recent developments; and (3) conversion besecond half of 1967. How many systems will be used will tween television systems. There is so far only one color not be clear until after the Oslo Conference, being held television system in use in the world: the NTSC 525-line in June 1966; but it seems almost too much to hope for system, employing a 6-Mc/s band. However, other possithat a single standard will result-desirable and logical bilities include a 625-line NTSC system with an 8-Mc/s as this would be. band, or one or two additional systems using the basic Television program exchange all over the world is principles of the NTSC system in the separation of the advancing very rapidly, with techniques now available chrominance and luminance signals but with different for relaying by satellite that were virtually undreamed of a methods of modulation on the chrominance subcarrier. decade ago. Not only will these facilities increase at a There are, therefore, program conversion problems of very rapid rate, but direct broadcasting from satellites considerable complexity, but the work that will be will probably also be achieved in the near future. This outlined should go a long way toward resolving them. increased use of television program exchange adds There is also, of course, widespread hope that the number strength to the argument for the greatest possible degree of television systems to go into service will be smaller of agreement on world standards of color television, or at than now seems possible. All countries realize the imleast for the provision of adequate means for translating portance of reducing standards to a minimum, and this one set of television standards to another and one color aim will be in the minds of all the delegates to the distelevision system to another. cussions at Oslo.In Europe, there is unity on the 50-field approach, Another matter of the greatest importance in the choice but not much unity in other matters-even in black and of a color system is the cost of the color receiver, its white. For histo...

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