DVD는 1990년대 중반에 도입되었으며 당시에는 매우 비쌌죠. 1998년도부터 대중화가 시작되어 심리적 저항선이었던 400불 이하로 떨어지게 됩니다.
The DVD, as you know, was introduced in the mid-1990s and it was quite expensive. But you can see that by 1998, it had fallen below 400 dollars, and 400 dollars was a psychological threshold.