Inter-plane reuse of coding parameters

An encoder for encoding, into a data stream, a video represented by multiple arrays of information samples, comprising:

• a data stream inserter configured for
• inserting, into the data stream, a first set of coding parameters associated with a first coding block in a first array of information samples that represents a first color component of the video, wherein the first set of coding parameters is to be used for reconstructing the first coding block,
• inserting, into the data stream, inter-plane interchange information associated with a second array of information samples that represents a second color component of the video, wherein the inter-plane interchange information signals whether, for each second block of a plurality of second blocks of the second array, a second set of coding parameters used for reconstructing the respective second coding block is to be derived based on the first set of coding parameters, and
• responsive to a determination based on the inter-plane interchange information that the second set of coding parameters is not to be derived based on the first set of coding parameters, inserting, into the data stream, the second set of coding parameters;
• and
• a predictor configured for responsive to a determination based on the inter-plane interchange information that the second set of coding parameters is to be derived based on the first set of coding parameters, copying at least one of the first set of coding parameters as equal to at least one of the second set of coding parameters, wherein a sampling format of the first array is different than a sampling format of the second array,
• wherein the second coding block is reconstructed based on the second set of coding parameters.

A non-transitory computer-readable medium storing a data stream, which is related to a video represented by multiple arrays of information samples, the data stream comprising:

• a first set of coding parameters associated with a first coding block in a first array of information samples that represents a first color component of the video, wherein the first set of coding parameters is to be used for reconstructing the first coding block,
• inter-plane interchange information associated with a second array of information samples that represents a second color component of the video, wherein the inter-plane interchange information signals whether, for each second block of a plurality of second blocks of the second array, a second set of coding parameters used for reconstructing the respective second coding block is to be derived based on the first set of coding parameters, and
• the second set of coding parameters associated with the second coding block when the inter-plane interchanging information signals that the second set of coding parameters is not to be derived based on the first set of coding parameters,
• wherein if the inter-plane interchange information signals that the second set of coding parameters is to be derived based on the first set of coding parameters, at least one of the first set of coding parameters is copied equal to at least one of the second set of coding parameters, wherein a sampling format of the first array is different than a sampling format of the second array.

A method of decoding a data stream encoded with a video represented by multiple arrays of information samples, the method comprising:

• extracting, from the data stream, a first set of coding parameters associated with a first coding block in a first array of information samples that represents a first color component of the video, wherein the first set of coding parameters is to be used for reconstructing the first coding block;
• extracting, from the data stream, inter-plane interchange information associated with a second array of information samples that represents a second color component of the video, wherein the inter-plane interchange information signals whether, for each second block of a plurality of second blocks of the second array, a second set of coding parameters used for reconstructing the respective second coding block is to be derived based on the first set of coding parameters;
• responsive to a determination based on the inter-plane interchange information that the second set of coding parameters is not to be derived based on the first set of coding parameters, extracting, from the data stream, the second set of coding parameters;
• responsive to a determination based on the inter-plane interchange information that the second set of coding parameters is to be derived based on the first set of coding parameters, copying at least one of the first set of coding parameters as equal to at least one of the second set of coding parameters, wherein a sampling format of the first array is different than a sampling format of the second array;
• and
• reconstructing the second coding block based on the second set of coding parameters.