Decoding of a digital image encoded at a plurality of resolution levels

A method of decoding encoded data, the encoded data comprising a plurality of predefined resolutions Rn, comprising the steps of:

• determining an intermediate resolution between a first resolution Ra and a second resolution Ra+1,
• determining a quantity of encoded data of the second resolution corresponding to the intermediate resolution,
• decoding the determined quantity of encoded data, and
• scaling the decoded image, as a function of the ratio between the intermediate resolution and one of the predefined resolutions Rn,
• wherein said determined quantity of encoded data includes encoded data corresponding to said first resolution Ra, and a part of encoded data included in encoded data corresponding to the second resolution Ra+1 but not included in the encoded data corresponding to said first resolution Ra.

A method of decoding encoded data, the encoded data comprising a plurality of predefined resolutions, comprising the steps of:

• selecting an intermediate resolution between a first predefined resolution and a second predefined resolution, the second resolution being higher than the first resolution,
• determining a quantity of encoded data of the second resolution depending on the intermediate resolution,
• decoding the determined quantity of encoded data, and
• subsampling the decoded data from the second resolution to the intermediate resolution.

A device for decoding an encoded digital image, the encoded data of the image comprising a plurality of predefined resolutions, comprising:

• means for selecting a resolution lower than the highest of the predefined resolutions,
• means for determining the predefined resolution immediately above the selected resolution,
• means for determining a quantity of data of the determined predefined resolution, as a function of the ratio between the selected resolution and the determined predefined resolution,
• means for decoding the image at the determined predefined resolution, as a function of the determined quantity of data,
• means for subsampling the decoded image, as a function of the ratio between the selected resolution and the determined predefined resolution.

A device for decoding encoded data, the encoded data comprising a plurality of predefined resolutions Rn, comprising the steps of:

• means for determining an intermediate resolution between a first resolution Ra and a second resolution Ra+1,
• means for determining a quantity of encoded data of the second resolution corresponding to the intermediate resolution,
• means for decoding the determined quantity of encoded data, and
• means for scaling the decoded image, as a function of the ratio between the intermediate resolution and one of the predefined resolutions Rn,
• wherein said determined quantity of encoded data includes encoded data corresponding to said first resolution Ra, and a part of encoded data included in encoded data corresponding to the second resolution Ra+1 but not included in the encoded data corresponding to said first resolution Ra.

A device for decoding encoded data, the encoded data comprising a plurality of predefined resolutions, comprising:

• means for selecting an intermediate resolution between a first predefined resolution and a second predefined resolution, the second resolution being higher than the first resolution;
• means for determining a quantity of encoded data of the second resolution depending on the intermediate resolution;
• means for decoding the determined quantity of encoded data;
• means for subsampling the decoded data from the second resolution to the intermediate resolution.