Image display control device, transmitting device, image display control method, and program for generating a substitute image

A transmitting device comprising:

• an image data generating section that generates image data representing a downscaled image obtained by downscaling an original image;
• and
• a transmitting section that transmits image data generated by the image data generating section to an image display control device,
• the image display control device including
• an image data receiving section that repeatedly receives the image data,
• a to-be-displayed-image generating section that generates a to-be-displayed image having a resolution higher than a resolution of the downscaled image on a basis of the image data,
• a substitute image generating section that, on a basis of first image data that is the image data received at a first timing, generates a substitute image that is an image different from the to-be-displayed image generated on the basis of the first image data, that corresponds to second image data that is the image data planned to be received at a second timing that comes after the first timing, and that has a resolution higher than the resolution of the downscaled image, and
• a display control section that causes either one of the to-be-displayed image generated on a basis of the second image data and the substitute image generated on a basis of the first image data to be displayed according to success or failure of the reception of the second image data,
• the substitute image generating section starting the generation of the substitute image corresponding to the second image data based on the first image data before the success or failure of the reception of the second image data is confirmed, wherein:
• the transmitting section further transmits feature-amount data that is associated with the image data and that represents at least one of a feature amount of the original image and a feature amount that is a parameter used in encoding of the downscaled image, and
• the transmitting section transmits the feature-amount data to the image display control device, prioritizing the transmission of the feature-amount data over transmission of the image data associated with the feature-amount data.

An image display control method comprising:

• repeatedly receiving image data, wherein:
• (i) the image data represents a downscaled image obtained by downscaling an original image, (ii) the image data is transmitted from a transmitting device, (iii) the transmitting device further transmits feature-amount data that is associated with the image data and that represents at least one of a feature amount of the original image and a feature amount that is a parameter used in encoding of the downscaled image, and (iv) the transmitting device transmits prioritizes the transmission of the feature-amount data over transmission of the image data associated with the feature-amount data;
• generating a to-be-displayed image on a basis of the image data;
• on a basis of first image data that is the image data received at a first timing, generating a substitute image that is an image different from the to-be-displayed image generated on a basis of the first image data and that corresponds to second image data that is the image data planned to be received at a second timing that comes after the first timing;
• and
• causing either one of the to-be-displayed image generated on a basis of the second image data and the substitute image generated on a basis of the first image data to be displayed according to success or failure of the reception of the second image data,
• wherein the generating the substitute image corresponding to the second image data on a basis of the first image data is started before the success or failure of the reception of the second image data is confirmed.

A non-transitory, computer readable storage medium containing a computer program, which when executed by a computer, causes the computer to perform an image display control method by carrying out actions, comprising:

• repeatedly receiving image data, wherein:
• (i) the image data represents a downscaled image obtained by downscaling an original image, (ii) the image data is transmitted from a transmitting device, (iii) the transmitting device further transmits feature-amount data that is associated with the image data and that represents at least one of a feature amount of the original image and a feature amount that is a parameter used in encoding of the downscaled image, and (iv) the transmitting device transmits prioritizes the transmission of the feature-amount data over transmission of the image data associated with the feature-amount data;
• generating a to-be-displayed image on a basis of the image data;
• on a basis of first image data that is the image data received at a first timing, generating a substitute image that is an image different from the to-be-displayed image generated on a basis of the first image data and that corresponds to second image data that is the image data planned to be received at a second timing that comes after the first timing;
• and
• causing either one of the to-be-displayed image generated on a basis of the second image data and the substitute image generated on a basis of the first image data to be displayed according to success or failure of the reception of the second image data,
• wherein the generating the substitute image corresponding to the second image data on a basis of the first image data is started before the success or failure of the reception of the second image data is confirmed.