A streaming architecture includes a two-layer architecture with a base layer and an enhanced layer. The base layer encodes computer generated content and generates an encoded bitstream. The enhanced layer encodes and transmit a chroma residual for a region of interest, wherein the encoded chroma residual stored in a UV33 surface that is inserted into a supplemental enhancement information (SEI) of the encoded bitstream from the base layer. A transmitter transmits the encoded bitstream to a receiver.

A streaming architecture includes a two-layer architecture with a base layer and an enhanced layer. The base layer encodes computer generated content and generates an encoded bitstream. The enhanced layer encodes and transmit a chroma residual for a region of interest, wherein the encoded chroma residual stored in a UV33 surface that is inserted into a supplemental enhancement information (SEI) of the encoded bitstream from the base layer. A transmitter transmits the encoded bitstream to a receiver.

The present invention relates to an apparatus and method for IP switching/routing SDI format image signal through bandwidth splitting and reduction, more specifically, which decomposes image signals consisting of YCbCr type color format entered with serial digital interface (SDI) into Y (luminance) component and C (chrominance) component, or multiple bit slice components; converts the components into IP packets and performs switching and/or routing of the IP packets; extracts Y component and C component or multiple bit slice components from the switched or routed IP packets; and combines the components into SDI format image signal and outputs the combined SDI format image signal. In addition, the present invention provides an apparatus switching/routing image signals through grid based networking, in which broadband switching or routing is performed with multiple narrow band switches or routers by switching or routing image signals through bandwidth splitting and reduction.

Color correction in high dynamic range video (HDR) using 2D look-up table (LUT) may be provided. The color correction may be applied in a decoder after decoding the HDR video signal. For example, the color correction may be applied before, during, or after chroma upsampling of the HDR video signal. The 2D LUT may include a representation of the color space of the HDR video signal. The color correction may include applying triangle interpolation to the sample values of the color component of the color space. The 2D LUT may be estimated by an encoder and signaled to the decoder. The encoder may decide to reuse a prior-signaled 2D LUT or use a new 2D LUT.

Disclosed are methods and apparatuses for image data encoding/decoding. A method for decoding a 360-degree image includes the steps of: receiving a bitstream obtained by encoding a 360-degree image; generating a prediction image by making reference to syntax information obtained from the received bitstream; adding the generated prediction image to a residual image obtained by dequantizing and inverse-transforming the bitstream, so as to obtain a decoded image; and reconstructing the decoded image into a 360-degree image according to a projection format. Therefore, the performance of image data compression can be improved.

Disclosed are methods and apparatuses for image data encoding/decoding. A method for decoding a 360-degree image includes the steps of: receiving a bitstream obtained by encoding a 360-degree image; generating a prediction image by making reference to syntax information obtained from the received bitstream; adding the generated prediction image to a residual image obtained by dequantizing and inverse-transforming the bitstream, so as to obtain a decoded image; and reconstructing the decoded image into a 360-degree image according to a projection format. Therefore, the performance of image data compression can be improved.

Disclosed are methods and apparatuses for image data encoding/decoding. A method for decoding a 360-degree image includes the steps of: receiving a bitstream obtained by encoding a 360-degree image; generating a prediction image by making reference to syntax information obtained from the received bitstream; adding the generated prediction image to a residual image obtained by dequantizing and inverse-transforming the bitstream, so as to obtain a decoded image; and reconstructing the decoded image into a 360-degree image according to a projection format. Therefore, the performance of image data compression can be improved.

Disclosed are methods and apparatuses for image data encoding/decoding. A method for decoding a 360-degree image includes the steps of: receiving a bitstream obtained by encoding a 360-degree image; generating a prediction image by making reference to syntax information obtained from the received bitstream; adding the generated prediction image to a residual image obtained by dequantizing and inverse-transforming the bitstream, so as to obtain a decoded image; and reconstructing the decoded image into a 360-degree image according to a projection format. Therefore, the performance of image data compression can be improved.

An apparatus comprises an unit to receive an input of an input image signal including a high resolution component signal and a low resolution component signal; an unit to obtain a high frequency component signal of the high resolution component signal and obtain a low resolution signal obtained by scaling down the resolution of the high resolution component signal; an unit to change a value of at least one of the low resolution signal and the low resolution component signal based on a combination of a value of the low resolution signal and a value of the low resolution component signal; and an unit to generate an output image signal corresponding to the input image signal based on the at least one of the low resolution signal and the low resolution component signal whose value has been changed, and the high frequency component signal.

Provided is a method and apparatus for converting, to a digital video signal, an analog video signal capable of having a variety of resolutions. A video reception apparatus determines a format of an analog video signal by sampling the analog video signal. The video reception apparatus converts the analog video signal to a digital video signal based on the determined format. A comb filter is used to separate a color difference signal and a luminance signal from the digital video signal, and the digital video signal is reconfigured using the luminance signal and the color difference signal.