FR2644959A1 - METHOD FOR REPRODUCTION OF LIVE VIDEO SIGNALS WITH IDLING SCENES - Google Patents

Abstract

a) A method of reproducing live video signals, with slow motion scenes. b) A method characterized in that controlling the scrolling devices 9 of several recording and reading devices 10, 11, 12 by a single control device 9 and time marks are written to allow returning to the beginning of 'an image scene and, at the start of the playback mode, the control device 9 is associated with at least one of the recording devices 10, 11, 12. c) The invention relates to a method for reproducing images. live video signals with slow motion scenes.

Description

Live video signal reproduction method

with slow motion scenes ".

  The present invention relates to a method of reproducing video signals recorded on an information carrier of a recording and playback apparatus, at a determined speed, and read during the playback mode operation, on the information carrier. at a speed different from the recording speed, with a control device not situated in the same place as the scrolling mechanism of the recording and reading apparatus, for the programmable control of the functions of the scrolling mechanism, the dispositif the control mechanism and the scroll mechanism, being connected by transmission lines of the operating states of the

  control device and the scrolling device.

  In order to repeat certain image events in the form of slow motion reproduction during a non-deferred transmission of a television program, it is known (US-A-4,386,379) to control the functions of a television program. professional video recorder via a data bus from a programming facility. The programming installation is designed to first record the scenes of images taken by a video camera on a magnetic tape of the video recorder. If it is desired to repeat a certain image event among the recorded image scenes at a slow motion, for example the scene of a goal, the assistant sets a time marker using the programming device. At the end of the goal scene, the magnetic tape is rewound to a preset position in anon of the instant of the fixed time mark. Slow reproduction of the predetermined image event can begin when the wizard presses a button or automatically. Particularly in the case of sporting events, it is desirable to associate with each television camera, a video recorder equipped with a programming device for filming from different angles of view, non-repeated scenes and reproduce them as in the form of slow motion during playback of the show. The recording and command devices required for such operations are usually found in the relay vehicle. But as the space available in a relay vehicle is generally limited, we can not consider integrating into a large-area control console, programming devices, cumbersome, so that the instantaneous reproductions, idle are not possible. The object of the present invention is to create a method of the above type which, despite a limited space requirement in the car carrier, makes it possible to control the video tape recorders associated with television cameras for

  perform slow motion reproduction.

  For this purpose, the present invention relates to a method of the above type, characterized in that

26449S9

  controls the scrolling devices of several recording and reading devices by a single control device and during a registration phase, time marks are recorded with the aid of the control device to characterize the start of a certain scene of images, in that, prior to a reproduction of the recorded video signals, the scrolling mechanisms are made to return using the fixed time marks, parallel to the beginning of the determined image scene and in that at the start of the reading mode, the control device is associated with at least one of the scrolling mechanisms of the recording and reproducing apparatuses and provides control of the functions of the

  recording and playback apparatus.

  The method according to the invention offers the advantage of allowing the control of several video recorders using a single programming device and a single assistant. It is thus possible to reduce the number of corresponding monitors to monitor the different video recorders. In addition, the connection cable for control, signal transmission, image control and

communication facilities.

  According to another characteristic of the in-

  vention, the association of the control device is done by an additional device which makes it possible to choose one or more recording apparatuses and

of reproduction.

  According to another characteristic of the invention, in parallel with the recording of the video signals by the different recording and reproduction apparatuses, the time information of a time code generator (clock) is recorded and in this respect when the scrolling mechanism of the recording and reproducing apparatus returns, the time information reproduced from one of the recording and reproducing apparatus determines the instant of start of the reproduction at slow motion.

  According to another characteristic of the in-

  At the same time that the control device is associated with a certain recording and reproducing apparatus, the video signal supplied by this recording apparatus is transmitted to a central monitor.

and reproduction.

  An exemplary embodiment of the invention is shown in the drawings and will be described more specifically hereinafter. So:

  FIG. 1 is a block diagram of the state of the art.

Picnic.

  - Figure 2 is a block diagram of the invention.

  The sche.a-block shown in Figure I shows

  Two video recorders 1 and 2 are associated with each one of them, a programming device 3 and 4 are associated. The two video recorders 1 and 2 as well as the programming devices 3 and 4 are connected by those lines 5 and 6 or 7 and 8. Lines 5 and 6 are used to control the most important functions of video recorders 1

  and 2 by the programming devices 3 and 4

  respectively associated. Lines 6 and 7 serve as

  return video recorders 1 and 2 to the dis-

  associated Programming Positions 3 and 4, to

  firm the performance of certain functions and transmit

  be time code signals. The transmission of signals through lines 5 to 8 is in the form of

  serial data telegrams.

  The operation of such devices according to the block diagram structure shown in FIG.

26449S9

  known in itself. Programming devices of this type are for example manufactured and distributed by Sony Corporation under the reference DTR-2000 or by BTS Broadcast Television Systems GmbH under the reference BPS 9A. In TV studios

  these devices are usually referred to as

Gramming "Slomo programmers".

  As indicated above, the programming devices used to control the slow motion

  or video recordings of video recorders, are very

  plicites (and thus relatively bulky) of

  to avoid manipulation errors during the actual transmission of the television program. Therefore, one can not associate with each video recorder, its own programming device, because the tables

  controls in the form of desks that equip the

  There are not enough room for governors. In-

  there is no room in the control truck for assistants, to control the different

programming devices.

  The block diagram of Figure 2 shows a single

  programming device 9 for the simul-

  of several video recorders 10, 12, 12; in the present example, there are three video recorders. A

  coupling device 13 equips the transmission lines

  mission linking programming device 9 and

  the video recorders 10, 11, 12; this device

  range determines according to the method of the invention, the

  sociation of the programming device and the differences

10, 11, 12 video recorders.

  To facilitate visualization and

  the coupling device 13 of the present

  exemplary embodiment comprises two groups of

  14, 15, ordered, which are ordered independently.

  control signals from lines 16 and 17

  by the programming device 9.

  The programatior device. 9 is subdivided

  referred to in four control areas. A first zone 18

  used to present the time code provided by the

  10-12. A second zone 19 is provided

  for the control of the main functions of

  these functions include, for example,

  a rapid advance and return of the magnetic tape

  as well as the order for the registration and

  reading. A third zone 20 makes it possible to select

  slow down the reproduction.

  For this, the control panel of the programming device 9 comprises pushbuttons for fixedly selecting predetermined idling speeds and a lever T for selecting

  variable idle speeds. The buttons

  21 of the zone 21 make it possible to associate the programming device 9 with the coupling device 13,

  reading, to one or more video recorders 10 to 12.

  The operation of such a device according to the method of the invention will be described hereinafter in the case of the example of a television transmission of a football game. It is supposed that in this part, the goal area is filmed by three cameras

  television stations that monitor this area from the goal to

  shot of three different lines of sight. Signals

  video transmitted by television cameras (not

  presented) are recorded by corresponding 10-12 video recorders. At the same time, magnetic tapes are written on a longitudinal track, the code of

  time generated by a time code generator (hor-

  22. The time code thus supplied is transmitted by the video recorder 10 and the inverter of the switch group 14 to the programming device 9 and from there it is displayed on the display device in the zone 18. a goal is drawn, the assistant who monitors the programming device 9 creates a time mark with a push-button located

  in zone 19; this time mark characterizes the in-

  stant of the goal. At the end of the goal stage, the assistant

  who orders quickly returns the magnetic tapes

  Each of the three VCRs 10 to 12 has a pre-set position, upstream from the instant of the fixed cutting mark, to then reproduce in slow motion, the images that precede the goal by a few seconds. As soon as

  control field of the programming device 9 si-

  that VCRs 10 to 12 have reached the starting point for slow-motion reproduction,

  the assistant informs by an internal liaison, the

  image of the transmission vehicle that can be

  start the transmission of slow motion reproduction.

  After agreement with the image board, the assistant may choose

  in zone 21 of the programming device 9, one of the three video recorders for slow motion reproduction. The programming device 9 is then associated with the video recorder selected at the start of the

slow motion reproduction.

  It is also possible to start several video recorders simultaneously for slow motion playback. In this case, the imageimage ensures the continuation of the treatment and the distribution of the

  slow motion signals provided by VCRs.

  At the end of the idle reproduction of the goal scene, by choosing one of the other video recorders, one can start the scene of the goal filmed by another television camera. In this case also, during slow motion playback, the person can change the speed of idle using

of the programming device (9).

  According to a development of the method of the invention, it is possible that, at the same time as a chosen video cassette recorder is chosen, the slow motion signal supplied by the magnetic tape is transmitted to a central monitor in order to reproduce each time the video signal emitted. instantly. This means makes it possible to limit maneuvering errors at the level of the device

programming 9.

  In this example embodiment, the association is provided by the groups of

  switches 14 and 15 of the coupling device 13.

  In the context of the present invention, it is obviously also possible to ensure the association of the programming device 9 by acting in a manner

  appropriate on the data transmitted by the lines.

Claims (3)

  1 ') A method of reproducing video signals recorded on an information carrier of a recording and playback apparatus, at a determined speed, and read during the playback mode operation, on the information carrier at a specified speed; speed different from the recording speed, with a control device not located in the same place as the scrolling mechanism of the recording and reading apparatus, pcu: the programmable control of the functions of the scroll mechanism, the control and the scrolling mechanism, being connected by transmission lines of the operating states of the control device and the scrolling device, characterized in that the scrolling devices of more than one of their recording and reading (10, 11, 12) are controlled by a single control device (9) and during a registration phase, time marks are recorded with the aid of the device. e control (9) for characterizing the beginning of a certain scene of images, in that, beforehand for a reproduction of the recorded video signals, the scroll mechanisms are made to return using the fixed time marks, in parallel until the beginning of the determined image scene and, in that at the beginning of the reading mode, we associate the   control device (9) at least one of the mechanisms   of the recording and playback apparatus (10, 11, 12) and controlling the functions of the recording and reading (10, 11, 12).   2 ') A method according to claim 1, characterized in that the association of the control device (9) is by an additional device (21, 16, 17 13, 14, 15) which allows to choose one or   several recording and reproduc-   tion (10, 11, 12). 3 ') The method according to claim 1, characterized in that in parallel with the recording of the video signals by the different recording and reproducing apparatuses (10, 11, 12), the time information is recorded. a time code generator (clock) (22) and that when the scrolling mechanism of the recording and reproducing apparatus (10, 11, 12) returns, the information of   time, reproduced from one of the recording devices   and reproduction (10, 11, 12) determines   the moment of the start of the reproduction in slow motion.   A method according to claim 1, characterized in that at the same time as the control device (9) is associated with a certain recording and reproducing apparatus (10, 11, 12), it is transmitted to a monitor central the video signal provided by this recording and reproducing apparatus (10, 11, 12).