Disclosure herein includes descriptions of a method for transmission of digital audio over analog video data with a single cable. The method comprising receiving, by a video transmitter, a digital video signal and one of a digital or an analog audio signal. Sampling, by an audio analog-to-digital converter (ADC), the audio signal if it is an analog audio signal. Storing, in a First-in-First-Out (FIFO) buffer, digital audio data corresponding to the sampled analog audio signal; reading, by an arbiter, the digitized audio samples, in response detecting an availability of data in the FIFO buffer and formatting the serialized audio bits with a digital start code; inserting the serialized audio bits and the digital start code into a blanking period of the digital video signal, thereby generating a combined digital audio and video signal and converting, by a digital-to-analog converter (DAC), the combined digital audio and video signal to analog, thereby generating a combined analog audio and video stream including audio data in a native form; and transmitting the combined analog audio and video stream to a receiver in one direction. In another embodiment, an analog signal is transmitted in the opposite direction.