a quantized PCM mode comprises performing quantization so as to sample the distortion added to the step of decoding video. In this way for a quantized PCM coding of video blocks appears brighter than the more uniform for example interframe prediction coding or frame in prediction coding and other lossy compression technique decoding of adjacent video block. video encoder firstly quantizes the input video sample by quantization step size before PCM coding the quantized sample. can be encoded in the video bitstream and the quantization step size signal is sent to the decoder. video decoder can receives a PCM-coded video samples of quantized encoded video bit stream. firstly using pulse code demodulation to decoding for these samples and then through the same quantization step size for encoding video for inverse quantization is performed. the video decoder can be output bit depth from the encoded video bitstream to extract the quantization step size.

A quantized PCM mode includes the step of quantizing samples so that distortion is added to coded video. In this way video blocks coded with quantized PCM appear more uniformly with adjacent video blocks that have been coded with other lossy compression techniques such as inter-prediction coding or intra-prediction coding. A video encoder may first quantize input video samples with a quantization step prior to PCM coding the quantized samples. This quantization step may be signaled to a decoder in the encoded video bitstream. A video decoder may receive the encoded video bitstream that includes quantized PCM coded video samples. These samples are first decoded using pulse code demodulation and then are inverse quantized with the same quantization step used to encode the video. The video decoder may extract this quantization step from the output bit-depth in the encoded video bitstream.