Patent GB-1048611-A (GB)
Title: Method of and equipment for filming and recording optical-acoustic scenes and the cutting and editing of the resulting shots
IPC: G11B27/10
Filed: 1964-01-07
Abstract: 1,048,611. Television. BAVARIA ATELIERG.m.b.H. Jan. 7, 1964 [March 21, 1963; April 10, 1963], No. 653/64. Heading H4F. [Also in Division G5] A method of taking optical-acoustic shots with a sound-recording equipment and a number of combined film and television cameras and associated television picture monitors and a common television picture monitor which can be connected at will to any of the combined film and television cameras, in which the picture sequence to be shot can be chosen in conjunction with the television reproduction, comprises making a characteristic mark on the film in the camera which is connected to the common monitor and a characteristic sound mark in the sound-recording apparatus for the purpose of correlating the picture and sound recordings so that the editing of the individual takes to form a final film corresponding to the picture on the common monitor is simplified and it is also possible to obtain reliable synchronization of the sound. The mark on the film in the camera connected to the common monitor is made by means of a glow discharge lamp arranged opposite the film perforations (Fig. 1, not shown) giving four light flashes per frame, three while the film is stationary and one while the film is moving. From the marks produced when the film is moving it can be determined whether or not the film is at the synchronous speed (Fig. 4, not shown), but if these marks, i.e. every fourth mark, are not required a switch is provided in the lamp's circuit which is opened and closed by a cam mounted on the shaft of the rotating shutter as is used in combined film and television cameras, e.g. a 180 degrees reflecting rotating shutter. A different mask is inserted between the lamp and the film in each camera so that the marks formed 116, 117, 119 correspond to a particular camera, Fig. 3. The characteristic sound marks associated with each camera are made on a sound track 111 separate from the ordinary acoustic sound track 121 but carried on the same carrier and are formed by different tones, Fig. 3, each associated with and characteristic of a correspondng camera. To save film only the camera of which the image is selected for display on the common monitor screen is switched on, the length of each shot taken by each camera being recorded by counting means, e.g. in terms of film length, the numbers being displayed and used to control the running time and sequence of each camera in the final take, the necessary lead-in or run-out time being taken care of. A mask or frame (Fig. 6, not shown) which is imaged on the photo-electric layer of each television camera may be provided in the cameras (Fig. 5, not shown) to mark the boundaries of the useful picture produced on the film. To check the adjustments of each television camera a test picture may be inserted in the plane of the reflected virtual image corresponding to the image produced on the film (Fig. 7, not shown). A matt disc or reticule may be arranged in the plane of the reflected virtual image corresponding to the image produced on the film so as to mark this plane so that the television part may be sharply adjusted on to it (Fig. 7, not shown).