System on chip, method for operating thereof and video system

A method for operating a system on chip (SoC) including a codec that is configured to sequentially encode a plurality of image frames, and a codec controller that is configured to send the plurality of image frames to the codec and allocate a buffer for encoding the plurality of image frames in a memory, the method comprising:

• sending a first image frame with a first resolution to the codec without allocating the buffer, through the codec controller;
• requesting, through the codec, the codec controller to allocate a first buffer of a first size corresponding to the first resolution, in response to receiving the first image frame;
• allocating the first buffer to the memory and sending the first image frame to the codec, through the codec controller;
• encoding the first image frame by using the first buffer and then sending the encoded first image frame to the codec controller, through the codec;
• allocating the first buffer to the memory and sending a second image frame with a second resolution that is smaller than the first resolution to the codec, through the codec controller;
• requesting the codec controller to allocate a second buffer of a second size that is smaller than the first size, in response to receiving the second image frame;
• allocating the second buffer to the memory and sending the second image frame to the codec;
• and
• encoding the second image frame by using the second buffer and then sending the encoded second image frame to the codec controller.

A video system comprising:

• a codec configured to encode a plurality of image frames;
• a codec controller configured to send the plurality of image frames to the codec and to allocate a buffer for encoding the plurality of image frames in a memory;
• a camera configured to send the plurality of image frames to the codec controller;
• and
• a display configured to display the plurality of image frames,
• wherein the codec controller sends a first image frame with a first resolution to the codec without allocating the buffer,
• the codec requests the codec controller to allocate a first buffer of a first size that corresponds to the first resolution, in response to receiving the first image frame,
• the codec controller allocates the first buffer to the memory and sends the first image frame to the codec,
• the codec encodes the first image frame by using the first buffer and then sends the encoded first image frame to the codec controller,
• the codec controller allocates the first buffer to the memory and sends a second image frame with a second resolution that is smaller than the first resolution to the codec,
• the codec requests the codec controller to allocate a second buffer of a second size that is smaller than the first size, in response to receiving the second image frame,
• the codec controller allocates the second buffer to the memory and sends the second image frame to the codec, and
• the codec encodes the second image frame by using the second buffer and then sends the encoded second image frame to the codec controller.