MPEG-2 was extended from earlier MPEG-1 in order to improve the weaknesses of MPEG-1, like audio compression system limited to two channels (stereo), poor compression when used for interlaced video, limitation for higher resolution video, supporting only one color space (4:2:0).
MPEG-2 ໄດ້ຂະຫຍາຍຈາກກ່ອນຫນ້າ MPEG-1 ເພື່ອປັບປຸງຈຸດອ່ອນຂອງ MPEG-1, ເຊັ່ນ: ລະບົບການບີບອັດສຽງຈໍາກັດສອງຊ່ອງ (stereo), ການບີບອັດທຸກຍາກໃນເວລາທີ່ນໍາໃຊ້ສໍາລັບວິດີໂອ interlaced, ຂໍ້ຈໍາກັດສໍາລັບວິດີໂອຄວາມລະອຽດສູງ, ສະຫນັບສະຫນູນພຽງແຕ່ຫນຶ່ງ ຊ່ອງສີ (4: 2: 0).