Adaptive differential pulse code modulation encoding apparatus and decoding...
A signal corresponding to a short-period change and a signal corresponding to a long-period change of a sound signal are detected, and optimal quantization is performed based on the combination of the...
View ArticleLossless image compression method
A compression method is used for processing an image having a plurality of pixels, in which an image width of the image is W. The compression method includes the steps of selecting N continuous pixels...
View ArticleImage compression method with variable quantization parameter
An image compression method s used for processing a plurality of pixels of an image. The image compression method includes the steps of receiving N successive pixels; obtaining N pixel differences and...
View ArticleDifferential pulse code modulation intra prediction for high efficiency video...
A video codec comprising a processor configured to compute a reconstructed pixel based on a residual pixel and a first prediction pixel and compute a second prediction pixel in a directional intra...
View ArticleVoice processing apparatus and voice processing method
A voice processing apparatus is provided in an ADPCM (Adaptive Differential Pulse Code Modulation) voice transmission system in which voice data that is differentially quantized through an ADPCM...
View ArticleElectrocardiogram signal compression and de-compression system
The invention provides an electrocardiogram signal compression and de-compression system. The invention uses the sign characteristics of the coefficients of the discrete cosine transform type IV and...
View Article2d block image encoding
A coder (e.g., an encoder or decoder) implements coding of two dimensional blocks of image data using two dimensional differential pulse code modulation (2D DPCM). The coder may switch between DPCM...
View ArticleDisabling sign data hiding in video coding
A video coder may determine that sign data hiding is disabled for a current block if the current block is generated using lossy coding without application of a transform to residual data and the...
View ArticleIntra prediction modes for lossy coding when transform is skipped
A video coder applies a residual differential pulse code modulation technique to a residual data of a block coded using lossy coding. The block may be coded without application of a transform to the...
View ArticleResidual differential pulse code modulation (dpcm) extensions and...
Techniques are described for harmonizing coding techniques when residual differential pulse code modulation (RDPCM) is applied to a residual block. In some examples, a scan order used for such a...
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