In 1993, Sega and Japanese electronics company Hitachi formed a joint venture to develop a new CPU for the Saturn, which resulted in the creation of the "SuperH RISC Engine" (or SH-2) later that year. The Saturn was designed around a dual-SH2 configuration. According to Kazuhiro Hamada, Sega's section chief for Saturn development during the system's conception, "the SH-2 was chosen for reasons of cost and efficiency. The chip has a calculation system similar to a DSP [digital signal processor], but we realized that a single CPU would not be enough to calculate a 3D world." Although the Saturn's design was largely finished before the end of 1993, reports in early 1994 of the technical capabilities of Sony's upcoming PlayStation console prompted Sega to include another video display processor (VDP) to improve the system's 2D performance and texture-mapping. CD-ROM-based and cartridge-only versions of the Saturn hardware were considered for simultaneous release during the system's development, but this idea was discarded due to concerns over the lower quality and higher price of cartridge-based games.