Modified coding for a transform skipped block for cabac in hevc

A method for decoding a bit stream associated with Transformed and Quantized Coefficients, TQC, in HEVC, the method comprising: - obtaining the bit stream (step 2611); - obtain N TQC from a bit stream block, wherein the block has a block size having the N TQC (step 2612); - determining a number of TQCs that are not equal to zero among the N TQCs (step 2613); - determining if the number of TQCs that are not equal to zero of the block is greater than a preset threshold, in which the preset threshold is 50% of N (step 2614); - if the number of TQCs that are not equal to zero in the block is greater than the preset threshold: + decode the level values ​​of the TQCs that are not equal to zero with a decoding by derivation omitting a context estimate and a probability update for the Context Adaptive Binary Arithmetic Coding, CABAC (step 2616), - if the number of TQCs that are not equal to zero in the block is not greater than the preset threshold: + decoding the non-zero TQC level values ​​with usual decoding using context estimation and probability update for CABAC (step 2615).