In this paper,considering that the limited modulation bandwidth and b looming effect in optical camera communication (OCC),it is suggested to perform color pre-enhancement processing based on YCbCr color space at the transmitter. Quadrature Phase Shift Keying (QPSK)-like two-dimensional mapping or demapping wi thin YCbCr color space can be utilized to realize signal modulation or demodulat ion.In order to enhance the system transmission capacity,a multi-input single - output (MISO) 4-Color Shift Keying (4-CSK) modulation scheme is further propos ed .In the experimental system,two LEDs are adopted to realize the MISO 4-CSK mo d ulation scheme.Meanwhile,CIElab color space is used in the experiment for comp arison with YCbCr color space.The experimental results show that under the hard -decision forward encode correction (HD-FEC) bit-error-rate (BER) limit of 3.8e- 3,the system with YCbCr color space modulation requires lower illumination inte nsity than that with CIElab color space modulation,which verifies that the prop osed YCbCr color space modulation scheme can improve the performance of the CSK - OCC system.In addition,under the BER of 3.8e-3,the required light intensity o f the system is reduced to 400-lux,and the transmission rate is high to 21.48k b/s.It is verified that the YCbCr color-space modulation based MISO-4CSK tran sm ission scheme is a promising technique for enhancing the data rate of the OCC sy stem.