Abstract: The invention concerns a method comprising a coding step consisting in replacing the original values of the file with coding values of reduced brightness, a common coding value being attributed to a group of original values, a step of restitution consisting in setting correspondence values between the coding value and the restored value, selected from one of the values of the corresponding group, an insertion step consisting in modifying the successive redundant restored values so as to produce shades and a step which consists in reading the values resulting from the insertion step.

Abstract: The inventive method makes it possible to reduce the size of a digital audio, image and/or video file in such a way that a reduced number of representative data needed for reformatting a file is transmitted to a receiving entity encoder. Said method consists in assigning references of at least one file component value to another value of the same component or in integrating at least one reference of the value group of the same component or another component into a component value group.

Abstract: The inventive method makes it possible to reduce the size of a digital audio, image and/or video file in such a way that a reduced number of representative data needed for reformatting a file is transmitted to a receiving entity encoder. Said method consists in assigning references of at least one file component value to another value of the same component or in integrating at least one reference of the value group of the same component or another component into a component value group.

Abstract: The invention concerns a method for reducing the size of raw or previously compressed data of a digital file from an audio and/or video source. It comprises an operational sequence including a step of desynchronizing original reading criteria of the file, said step involving the compression and the compacting of preserved data and a step of resynchronizing the desynchronized file enabling it to be viewed and/or read based on its original criteria of resolution and duration.

Abstract: The invention concerns a method comprising a coding step consisting in replacing the original values of the file with coding values of reduced brightness, a common coding value being attributed to a group of original values, a step of restitution consisting in setting correspondence values between the coding value and the restored value, selected from one of the values of the corresponding group, an insertion step consisting in modifying the successive redundant restored values so as to produce shades and a step which consists in reading the values resulting from the insertion step.