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US 9,319,699 B2Granted
Apparatus, method and program for image conversion
AssigneeNEC Corporation
InventorsKazuteru Watanabe, Kazunori Ozawa
Life of this patent
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Abstract
Disclosed is a conversion apparatus including a decoding unit that decodes input encoded data into image data, and a size conversion unit that converts size of the image data based on a size conversion request received from outside and that expands/contracts, or splits/synthesizes motion vector or prediction mode of encoding parameters, received from the decoding unit, based upon a size conversion request, and an encoding unit that encodes image data after size conversion using the prediction mode or motion vector converted and transmits the resulting encoded image data via a transmission buffer to outside.
Claims17
An image conversion apparatus comprising:
- a decoding unit that receives first encoded data and decodes said first encoded data into image data;
- a size conversion unit that receives said image data from said decoding unit and changes a size of said image data;
- an encoding unit that receives said image data having said size thereof changed by said size conversion unit and encodes said image data, said encoding unit re-using prediction mode and block size information of said first encoded data for intra-frame prediction, said encoding unit re-using motion vector, said block size, and reference frame information of said first encoded data for inter-frame prediction;
- and
- a conversion control unit that receives a size conversion request and a set of encoding parameters supplied from said decoding unit, said conversion control unit supplying said size conversion request to said size conversion unit, said conversion control unit generating conversion information including at least one of said prediction mode, said block size, said motion vector and said reference frame information from said encoding parameters to supply said conversion information to said encoding unit, wherein said conversion control unit configures a prediction direction approximated to a corresponding prediction direction of said first encoded data if said corresponding prediction direction is not present in said intra-frame prediction mode of said image data having said size thereof changed.
2 more elements
An image conversion method comprising:
- receiving, by a decoding section, first encoded data and decoding said first encoded data into image data;
- performing, by a size conversion section, size conversion of said image data;
- encoding, by an encoding section, said image data having a size thereof changed, by re-using prediction mode and block size information of said first encoded data for intra-frame prediction, and re-using motion vector, said block size, and reference frame information of said first encoded data for inter-frame prediction;
- receiving, by a conversion control section, a size conversion request and a set of encoding parameters of said first encoded data and supplying said size conversion request to a size conversion section;
- generating, by said conversion control section, conversion information including at least one of said prediction mode, said block size, said motion vector, and said reference frame information from said encoding parameters to supply said conversion information to said encoding unit;
- and
- configuring, by said conversion control section, a prediction direction approximated to a corresponding prediction direction of said first encoded data if said corresponding prediction direction is not present in said intra-frame prediction mode of said image data having said size thereof changed.
4 more elements
A non-transitory computer readable-recording medium storing therein a program causing a computer to execute the processing comprising:
- receiving first encoded data and decoding said first encoded data into image data;
- performing size conversion of said image data;
- encoding said image data having a size thereof changed, by re-using prediction mode and block size information of said first encoded data for intra-frame prediction, and re-using motion vector, said block size, and reference frame information of said first encoded data for inter-frame prediction;
- and
- receiving a size conversion request and a set of encoding parameters of said first encoded data, supplying said size conversion request to a size conversion unit, and generating conversion information including at least one of said prediction mode, said block size, said motion vector, and said reference frame information from said encoding parameters to supply said conversion information to said encoding processing of said image data, and configuring a prediction direction approximated to a corresponding prediction direction of said first encoded data if said corresponding prediction direction is not present in said intra-frame prediction mode of said image data having said size thereof changed.
2 more elements
Dependencies are inferred from the claim text.