Method for the simultaneous depiction of at least two temporally sequential events on television, and equipment for implementing this method
BACKGROUND OF THE INVENTION 
     The invention concerns a method for the simultaneous showing of at least two temporally sequential events. The invention also concerns equipment for implementing this method. 
     According to the general concept of the present invention, the method is to be used particularly for sports events that take the form of racing (for example, ski racing, bobsled racing, speed skating) and also jumping (ski jumping, broadjumping, pole vaulting). It is already known how to record temporally sequential events and to show them simultaneously on a split screen. In order to substantially synchronize the course of events shown simultaneously, one of the two image memories, which are mostly in the form of a video tape, is experimentally wound forwards and backwards until the two events can run essentially parallel next to each other at the same time. It is already possible, through a procedure of this type, to compare events that have been artificially made to be parallel by means of recording, for example ski races, and to determine, for example, in which stretch or at which gate a racer made mistakes that became apparent as loss of time. 
     Despite this existing possibility of comparison, the known procedure is disadvantageous, in that a really exact paralleling of the type necessary for the comparison of relatively rapid events cannot be achieved manually. The known procedure makes this possible only in retrospect, that is, after each sports event has been recorded. 
     The prior art as in FUNK-TECHNIK, Vol. 40 (1985), No. 10, pages 409-410, shows a television device for reproducing several video signals. Two temporally sequential events, that is, a live television program and video recordings, can simultaneously be reproduced on a picture screen. however, this prior art does not suggest showing events of a similar nature parallel or synchronously on the picture screen. 
     SUMMARY OF THE INVENTION 
     The task of the invention is to indicate a method as well as a piece of equipment that make it possible to show sports events of the type described in a more interesting and expressive way, and to create for sportspersons and managers a method of comparing individual racing or jumping events that can be provided as early and as exact as possible. 
     The heart of the invention lies in updating a sports event in such manner that next to the live event, which is shown as well as recorded as for instance broadcast via a television installation, a pre-recorded running or jumping event is provided in precise temporally- or spatially-parallelized representation. For example, in the case of a live ski slalom broadcast, there is an electronic parallel slalom, in which advantageously the best-time run to date is shown next to and at the same time as the live event. Viewers can measure the racers visually against the best to date, and observe how one racer &#34;drives&#34; more or less like the other. Differences thereupon become visible not only as temporal information but also as visual distance differences, as is also the case in a genuine live-parallel slalom. It is significant here that the human being is not able to make exact comparison solely with the help of time information. It is much easier and more agreeable for the human eye to compare optical stretches and to determine the differences, and to thereby compare the performance of two sports persons. Advantageously, the method according to the invention also offers the possibility of determining in an easy way, during the entire race and over the entire course, which of the two racers shown is actually leading. With time information, this is possible only via one or more intermediate times or after the goal has been reached. Even experienced sports reporters, after expressing opinions during the last few seconds of a ski race concerning the good form of a racer, must learn from the finishing order according to the measured running time that they were mistaken. By means of &#34;electronic parallel running,&#34; it can easily be determined at any time, and in particular during any stretch, which racer is falling back and which racer is closing the gap and/or leading. 
     An inventive element of the method is that the picture storage device that constitutes the reproducer (for example a tape recorder) can be controlled by the object moving in the sports event (for example the racer or a bobsled). Only in this way can it be guaranteed that the events will really be temporally or spatially exactly parallel. 
     The method according to the invention can be used in races in which time is measured, but it can also be used, with certain limitations and modifications, for jumping races, particularly ski jumping, pole-vaulting, and so on. This will be clarified below by means of a ski jumping race in which the distance is determined. 
     In ski jumping the questions of in which phases of the descent a jumper assumes which position, how high he or she jumped, and/or which initial descent speed he achieved through optimum starting position, are of particular interest. For example, if a live jumper in the upper portion of take-off triggers a start mark that starts a preliminary recording of a jump at exactly the same spot, and then two jumpers run down the same jump hill, so that it can initially be determined who is the first to jump off the takeoff platform (a benchmark is thereby set for comparison of the take-off speed), by means of parallel representation it can then easily be analyzed which jumper is the first to reach an optimum descent position, how high he soars over the track, when he &#34;comes down for landing,&#34; and where he leaps up. All descent phases can thereby be continuously and directly compared with one another, and thus the same advantages as in a race are achieved. 
     It is enlightening that a live event can be shown in parallel with an event of the same type previously stored in the picture memory. Events of the same type are those events that relate to the same type of sport, the same section and that have approximately the same motion of start-up, etc. The method according to the present invention is particularly directed to events that involve such criteria. 
     The characteristics of showing the events in spatially parallel form involve controlling the running speed of the picture memory in reproduction mode, for example the reproduction speed of a video tape, in for instance an accelerated or lagged manner, so that both racers are moving continuously in the electronic parallel depiction in exactly the same stretch. It is thus no longer possible to obtain information from the parallel representation about which runner is leading or behind, for example, but trainers and managers in particular have the possibility of comparing the running times of different racers at exactly the same points along the course. An electronic still device can be provided in such a manner that both the live event and the reproduced event from the past can be frozen next to each other at exactly the same place (freeze-frame operation method). 
     Further, according to the present invention the temporally synchronous and/or spatially parallel course is to be controlled either through markings along the path of movement or by the moving object of the sports event (this can be a racer, a jumper, or even a bobsled). Control here means that the sports event is temporally synchronized or parallelized repeatedly at several points, or that the two racers, for example, can be artificially placed next to each other at an interim-time mark in order to see which runner is leading the other at a particular point in the event, or through a number of individual marks triggered, covered, or updated in some other way by for instance the racer or the bobsled in its course. The reproducing picture memory is controlled (that is, accelerated or slowed down) as regards its reproduction speed, so that the two racers can be simultaneously seen at the same points on the picture screen(s), at the same time along the entire course exactly in parallel, even though one of the racers is travelling or has travelled much faster than the other one. 
     It is possible to provide patterns (bar-code patterns) along the course, which are analyzed and localized by pivoting the camera, and which are particularly suitable for transmitting signals as soon as a racer overtakes the relevant bar-code. A plurality of such bar-code patterns, distributed for instance equidistantly over the course, is thus suitable for controlling (accelerating or braking) the reproducing picture memory, in conjunction with the moving object, for the purpose of the temporal synchronization or spatial parallelizing. 
     The equipment according to the invention is explained in greater detail by means of an embodiment shown in the illustration. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     The illustration shows a block diagram of an embodiment of the present invention. 
    
    
     DESCRIPTION OF PREFERRED EMBODIMENTS 
     The equipment 10 depicted in the illustration shows first of all a television recording and broadcasting system, including for instance a plurality of video cameras 12-I, 12-II, 12-III connected via camera wires 14 to a production center 16, which contains a mixer 18 for mixing and separating the incoming signals. Also connected to the production center 16 is a manual input device in the form of a keyboard 20, through which alphanumerical information concerning the sports event can be superimposed on the video signal. 
     The production center 16 is also linked via a transfer device 22 with a number of picture memories 24-I to 24-IV in the form for instance of several tape recorders. The signal lines 26, 28 running between the picture memories 24, the transfer device 22, and the mixer 18 are constructed in such manner that they can serve as two-way lines, so that the signals can be transferred from the production center 16 to the memories 24 and back again. The purpose of the transfer device 22 is to transfer the video signals leaving the mixer 18 to one (or more) of the picture memories 24-I to 24-IV, and/or to purposefully play the signals coming from one of the picture memories 24-I to 24-IV. For this purpose, the transfer device 22 is connected with a control and selection device 30, which can be controlled purposefully either via line 32 directly from the production center 16 or via a computer/comparer 34 that controls the changeover of picture memories 24-I to 24-IV dependent on running times determined by an electronic timekeeper 36. This control proceeds in such manner that, for example, picture memory 24-I is constantly recording new runs or jumps, and picture memory 24-II continuously replays to the reproduction center 16 the current best times in effect, until this best time is cancelled out by a new (live-best time) record. Then the new best-time recorded in picture memory 24-I is reproduced in parallel to the live events that may thereafter be recorded in picture memory 24-II, until the computer/comparer 34 determines a new best-time and activates the transfer device 22. This means that not only the video signals but also the operating mode signals that establish whether the picture memories are operating in the record or reproduce mode are given to the picture memory 24-I. 
     It is also significant that for instance in picture memory 24-I the start signal given by the electronic timekeeper 36 is recorded as a reproduction start signal by which the relevant reproduction is started, in order to guarantee a synchronous parallel course of the live event and the recorded event. The corresponding selection of each picture memory 24-I to 24-IV is done via the computer/comparer 34 and via the control and selection equipment 30, from which a common start signal wire 38 leads to the picture memories 24-I to 24-IV. 
     The picture memories 24-III and 24-IV serve, for example, for simultaneous recording of partial segments of the live event, with both the video signals and also the operating mode signals for determining record or reproduce modes being conveyed to picture memories 24-III and 24-IV via the signal lines 28 in the same way as they are led to picture memories 24-I and 24-II. 
     A number of signal transmitters 40 that are triggered by the runners or jumpers at the start, at halfway or mid-point, or at the goal or end of the course. These signal transmitters can be a light barrier or a mechanical start barrier, in a manner that is known in and of itself. 
     A TV transmitter 42, a monitor 44, and an indicator panel 46 are connected with the electronic timekeeper 36. Components of this type belong to the general state of the art. 
     The present invention is not limited to the particular disclosed embodiments, but rather only by the scope of the claims, as would be understood by a skilled worker in the art in possession of the present disclosure.