The present invention discloses a timing controller and a liquid crystal display comprising the same, wherein, the timing controller comprises a data converting module (10) for converting inputted serial video stream data into parallel video stream data, and a memory (30) for storing the parallel video stream data, and also comprises an output module (50) connected with the memory (30) for generating a predetermined clock signal and outputting the parallel video stream data under the control of the predetermined clock signal. With the technical solution of the present invention, the problem in the prior art is solved that the rate of the outputted video stream data is affected by the input. In addition, as the outputted video stream data is controlled by the clock signal it generates, this solves the problem of long locking duration of the timing controller in the prior art.