A video signal transmission device, comprising: a packer unit configured to capture a data enable signal and a video signal constituted by a number of pixel signals, each of which corresponds to one pixel and includes a color signal and a sync signal, wherein the video signal only includes the color signal when the data enable signal is at a first level and the video signal only includes the sync signal when the data enable signal is at a second level, and the packer unit is further configured to apply packetizing processing to the video signal to generate a plurality of block signals, each block signal comprising a predetermined number of bits; an encoder unit configured to apply encoding processing to the plurality of block signals to generate a plurality of encoded block signals; and a serializer configured to apply parallel-serial conversion to the plurality of encoded block signals to output a serial signal, characterised in that: the packer unit includes a pixel packer and a color packer and is further configured to generate a control signal (Control (D/K)) including a pulse having a pulse width corresponding to the number of blocks defined by the product of the number of pixels per video signal and the number of block signals required for the tone bits of the color signal in a pixel signal, the pixel packer applying packetizing processing to the video signal in accordance with the data enable signal so that the video signal has a packet configuration of size corresponding to the number of pixels per video signal, the color packer applying packetizing processing to the signal output by the pixel packer in accordance with the data enable signal so that the signal output by the pixel packer has a packet configuration of size corresponding to the number of block signals required for the tone bits of the color signal in a pixel signal, and the encoder unit applies encoding processing of encoding efficiencies different between a first period of the control signal in which the pulse exists and a second period of the control signal distinguished from the first period depending on existence or non-existence of the pulse. a packer unit configured to capture a data enable signal and a video signal constituted by a number of pixel signals, each of which corresponds to one pixel and includes a color signal and a sync signal, wherein the video signal only includes the color signal when the data enable signal is at a first level and the video signal only includes the sync signal when the data enable signal is at a second level, and the packer unit is further configured to apply packetizing processing to the video signal to generate a plurality of block signals, each block signal comprising a predetermined number of bits; an encoder unit configured to apply encoding processing to the plurality of block signals to generate a plurality of encoded block signals; and a serializer configured to apply parallel-serial conversion to the plurality of encoded block signals to output a serial signal, characterised in that: the packer unit includes a pixel packer and a color packer and is further configured to generate a control signal (Control (D/K)) including a pulse having a pulse width corresponding to the number of blocks defined by the product of the number of pixels per video signal and the number of block signals required for the tone bits of the color signal in a pixel signal, the pixel packer applying packetizing processing to the video signal in accordance with the data enable signal so that the video signal has a packet configuration of size corresponding to the number of pixels per video signal, the color packer applying packetizing processing to the signal output by the pixel packer in accordance with the data enable signal so that the signal output by the pixel packer has a packet configuration of size corresponding to the number of block signals required for the tone bits of the color signal in a pixel signal, and the encoder unit applies encoding processing of encoding efficiencies different between a first period of the control signal in which the pulse exists and a second period of the control signal distinguished from the first period depending on existence or non-existence of the pulse. the packer unit includes a pixel packer and a color packer and is further configured to generate a control signal (Control (D/K)) including a pulse having a pulse width corresponding to the number of blocks defined by the product of the number of pixels per video signal and the number of block signals required for the tone bits of the color signal in a pixel signal, the pixel packer applying packetizing processing to the video signal in accordance with the data enable signal so that the video signal has a packet configuration of size corresponding to the number of pixels per video signal, the color packer applying packetizing processing to the signal output by the pixel packer in accordance with the data enable signal so that the signal output by the pixel packer has a packet configuration of size corresponding to the number of block signals required for the tone bits of the color signal in a pixel signal, and the encoder unit applies encoding processing of encoding efficiencies different between a first period of the control signal in which the pulse exists and a second period of the control signal distinguished from the first period depending on existence or non-existence of the pulse.