Image decoder, image encoder, and encoded data converter
AssigneeSharp Kabushiki Kaisha
InventorsTomoyuki YAMAMOTO, Tomohiro IKAI, Takeshi TSUKUBA
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Abstract
The amount of encoding of hierarchically encoded data is reduced with an improvement in the accuracy of a predicted image by including information for accurate derivation of a position of a reference layer pixel corresponding to a pixel in a higher layer, which is a target layer, in the hierarchically encoded data. A hierarchical moving image decoder (1) includes a parameter set decoding unit (12) decoding inter-layer phase correspondence information and a predicted image generator (1442) generating a predicted image on the basis of the inter-layer phase correspondence information.
Claims4
1-8. (canceled)
An image decoder for decoding hierarchically encoded data, the decoder comprising:
- a parameter set decoding unit configured to decode a parameter set that including at least an inter-layer pixel correspondence offset and an reference layer crop offset;
- and
- a reference position derivation unit configured to derive a reference layer phase offset by the reference layer crop offset and an inter-layer size ratio;
- wherein
- the reference position derivation unit is configured to derive a corresponding reference position of a reference picture using (i) the reference layer phase offset, (ii) the inter-layer pixel correspondence offset, and (iii) the inter-layer size ratio.
A method for decoding hierarchically encoded data, the method comprising:
- decoding a parameter set that including at least an inter-layer pixel correspondence offset and an reference layer crop offset;
- deriving a reference layer phase offset by the reference layer crop offset and an inter-layer size ratio;
- and
- deriving a corresponding reference position of a reference picture using (i) the reference layer phase offset, (ii) the inter-layer pixel correspondence offset, and (iii) the inter-layer size raio.
An image encoder for encoding hierarchically encoded data, the encoder comprising:
- a parameter set encoding unit configured to encode a parameter set that including at least an inter-layer pixel correspondence offset and an reference layer crop offset;
- and
- a reference position derivation unit configured to derive a reference layer phase offset by the reference layer crop offset and an inter-layer size ratio;
- wherein
- the reference position derivation unit is configured to derive a corresponding reference position of a reference picture using (i) the reference layer phase offset, (ii) the inter-layer pixel correspondence offset, and (iii) the inter-layer size ratio.
Dependencies are inferred from the claim text.