Data transmission method and related device for virtual reality system

A data transmission method for a virtual reality system, the data transmission method comprising:

• receiving a first image and a second image;
• stretching the second image, and merging the first image with a stretched second image to obtain an image to be displayed;
• and
• displaying the image to be displayed;
• the data transmission method further comprises, prior to the receiving the first image and the second image:
• capturing a portion of an image to be transmitted in a preset area to obtain the first image, and compressing a portion of the image to be transmitted in a display area to obtain the second image, wherein the preset area is a portion of the display area;
• and
• transmitting the first image and the second image to a virtual reality apparatus in a certain order;
• and
• wherein the capturing the portion of the image to be transmitted in the preset area to obtain the first image and the compressing the image to be transmitted to obtain the second image comprise:
• performing image sampling on the preset area of the image to be transmitted with a preset first resolution, a preset first field angle and a preset first refresh rate to obtain the first image;
• and
• performing image sampling on the display area of the image to be transmitted with a preset second resolution, a preset second field angle and a preset second refresh rate to obtain the second image;
• wherein the first resolution and the second resolution are equal to each other, the first field angle is less than the second field angle, and the first refresh rate is greater than or equal to the second refresh rate.

A virtual reality apparatus, comprising:

• a receiver configured to receive a first image and a second image transmitted from a virtual reality host;
• an image merger configured to stretch the second image, and merge the first image with a stretched second image to obtain an image to be displayed;
• and
• a display configured to display the image to be displayed,
• wherein the virtual reality host comprises:
• an image processor configured to capture a portion of an image to be transmitted in a preset area to obtain a first image, and compress a portion of the image to be transmitted in a display area to obtain a second image, wherein the preset area is a portion of the display area;
• and
• a transmitter configured to transmit the first image and the second image to the virtual reality apparatus in a certain order;
• and
• wherein the image processor is further configured to:
• perform image sampling on the preset area of the image to be transmitted with a preset first resolution, a preset first field angle and a preset first refresh rate to obtain the first image;
• and perform image sampling on the display area of the image to be transmitted with a preset second resolution, a preset second field angle and a preset second refresh rate to obtain the second image;
• wherein the first resolution and the second resolution are equal to each other, and the first refresh rate is greater than or equal to the second refresh rate.