TH26283A - Signal transmission method - Google Patents

Abstract

By means of transmission of signals which are constantly divided by windows in nested blocks. Some of the signals contained within the block are converted to a spectrum by conversion. Later, the spectrum was encrypted. Sent after transmission is decoded and converted back to partial signal by final reverse conversion. Some of the signal-containing blocks are joined together in a nested way. Where the nested areas of the blocks are weighted in such a way that the sum of the function windows is 1 to prevent interference in adjacent blocks with signal changes. Length of the function window Is selected depending on the signal change This method is suitable for audio and video signals which are subject to degradation during transmission.

Claims (1)

1. Method for transmitting audio signals That is divided by the function of windows (f (n), g (n)) (Windowfunction) to overlapping and continuous windows. Some of the prompts contained in the aforementioned windows, in each case, are transformed into a spectrum. Where the spectrum is subsequently encoded, transmitted, decoded, the subsequent transmission and is regenerated to a partial signal again by reverse conversion. Depending on the windows containing the signal Some of these parts to be assembled in an overlapping manner, where overlapping services in the window are weighted so that the output of the window function (f (n), g (n)) is equal. one And where the following window functions are created in the region overlapping the previous windows. By mirroring the window, the functions that appeared in this area in the previous window. The characteristic is that the length is the length of the window function (f (n), g (n)) is coated of the transducer function. Where the length of the function window Will be selected to be smaller for the signal variation The larger and larger the smaller the signal change, and where the different set of windows functions (f (n), g (n)) are determined from the set in each case of the windows function. It is classed as a function of transmutation, and during that transmission, an index number that explicitly specifies the organized function window is sent, and where the sinusoidal window function window is sent. Choose a high frequency And in contrast to the smaller function windows and two different asymmetrical windows, functions with an asymmetrical shape are included. And where high amplitude jumps are positioned in a small function window, and where in each case of a window with a function window, Small windows have a similar function window with an asymmetric shape, there is a nearby window with a sinusoidal function window. And where the corresponding half of the window function (f (n), g (n)) of adjacent windows corresponds to the equation in the overlapping region as follows: f (N-1-n) = g (n) 0 < = n < = N / 2-1 f2 (N / 2 + n) + g2 (n) = 2 0 < = n < = N / 2-1 Where N is equal to the number of samples of that window.