Abstract: A method of transmitting pictorial data provides for reduction of required transmission bandwidth by constructing the pictorial data in the form of a composite image of primitive pictures. Each of the primitive pictures has a simple geometric form such as a line, a circle, a triangle, and a quadrilateral. Each of these primitive pictures is identified by a parameter, which may take the form of an alphanumeric character. Coordinates of a center of a circle, and of end points of a line, and of vertices of a polygon are identified by pairs of parameters giving the X and the Y coordinates of a two-dimensional display of the image. If desired, the image can be constructed as a perspective view of a three-dimensional object, in which case tetrahedrons, spheres, and hexahedrons may be employed. The parameters are converted to digital signals which are transmitted via a communication link to a display for the regeneration of the original image.

Abstract: This invention relates to a method by means of which more than one audio signal can be recorded in compressed form in a memory element, and to a system implementing such a method. In the system according to the invention, audio signal samples are recorded only when voice is detected in the audio signals. The system according to the invention saves memory capacity required by the recording by combining the audio signal samples when voice is detected in samples of more than one audio signal. Furthermore, an audio signal is not recorded when no voice is detected in the signal. The invention also reduces the average computing capacity needed and thus power consumption, since signal combination, or mixing, is advantageously performed only when voice is detected in the samples of more than one audio signal.