IMPROVED ERROR CONCEALMENT IN FREQUENCY RANGE Russian patent published in 2008 - IPC G10L19/00 

FIELD: error concealment technique.

SUBSTANCE: essence of the invention lies in the concealment of coding coefficients with errors, using correlation of the coding coefficient on time as well as on frequency. The concealment technique can be applied to any type of information, such as audio data, video data and image data, which are compressed into coding coefficients and transmitted under unfavourable conditions in the channel. Error concealment is achieved using redundancy of the initial data signal on time as well as on frequency. This provides the possibility of using redundancy between frames (inter-frame), as well as within the limits of frames (intra-frame). Use of coding coefficients from the same frame, consisting of the coding coefficient with the error, is sometimes called correlation of intra-frame coefficients, and it is a more special case than the general frequency correlation.

EFFECT: provision for efficient error concealment in a frequency range, which is more optimal and uses redundancy of the initial data signal.

38 cl, 17 dwg