Low-voltage Differential Signaling - LVDS Transmission With 8b/10b Encoding

LVDS Transmission With 8b/10b Encoding

LVDS does not specify a bit encoding scheme because it is a physical layer standard only. LVDS accommodates any user-specified encoding scheme for sending and receiving data across an LVDS link, including 8b/10b encoded data. An 8b/10b encoding scheme embeds the clock signal information and has the added benefit of DC balance. DC balance is necessary for AC-coupled transmission paths (such as capacitive or transformer-coupled paths). There are also DC-balance encoding methods for the start bit/stop bit embedded clock, which usually include a data scrambling technique. The key point is LVDS is the physical layer signaling to transport bits across wires. It is compatible with almost all data encoding and clock embedding techniques.