Methods and apparatus for improvement of transform information coding according to intra chroma cross-component prediction model in video coding

A method of coding colour pictures using coding tools including one or more cross component models related modes, the method comprising:

• receiving input data associated with a current block comprising a first-colour block and a second-colour block, wherein the input data comprises pixel data to be encoded at an encoder side or data associated with the current block to be decoded at a decoder side;
• determining a prediction candidate list comprising one or more inherited CCP (Cross-Component Prediction) candidates, wherein CCM (Cross-Component Model) information associated with at least one CCP candidate is stored in addition to one or more inherited model parameters of said at least one CCP candidate;
• and
• encoding or decoding the second-colour block by using information comprising the prediction candidate list, wherein when said at least one CCP candidate is selected for the current block, prediction data for the second-colour block are generated by applying said one or more inherited model parameters of said at least one CCP candidate along with the CCM information to reconstructed first-colour block.