Title :
Special memory and embedded memory macros in MPEG environment
Author :
Otomo, Goichi ; Hara, Hiroyuki ; Oto, Takeshi ; Seta, Katsuhiro ; Kitagaki, Kazukuni ; Ishiwata, Shun-ichi ; Michinaka, Shuji ; Shimazawa, Takayoshi ; Matsui, Masataka ; Demura, Tatsuhiko ; Koyama, Motoaki ; Watanabe, Yoshinori ; Sano, Fumihiko ; Chiba, A
Author_Institution :
Semicond. Device Eng. Lab., Toshiba Corp., Kawasaki, Japan
Abstract :
Special memory and embedded memories used in a newly designed MPEG2 decoder LSI are described. Orthogonal memory is employed in a IDCT (Inverse Discrete Cosine Transform) block for small area and power. FIFOs and other dual-port memories are designed by using a single-port RAM operated twice in one clock cycle to reduce cost. As for testability, direct test mode is implemented for small area. An instruction RAM is placed outside the pad area in parallel to a normal instruction ROM and activated by Al-masterslice for extensive debugging and an early sampling. Other memory related techniques and the key features of the decoder are also described
Keywords :
decoding; discrete cosine transforms; integrated circuit testing; large scale integration; multimedia systems; random-access storage; video signal processing; FIFO; IDCT; MPEG environment; debugging; decoder LSI; direct test mode; dual-port memories; embedded memory macros; instruction RAM; inverse discrete cosine transform; multimedia LSI; orthogonal memory; single-port RAM; Clocks; Costs; Debugging; Decoding; Discrete cosine transforms; Large scale integration; Random access memory; Read only memory; Read-write memory; Testing;
Conference_Titel :
Custom Integrated Circuits Conference, 1995., Proceedings of the IEEE 1995
Conference_Location :
Santa Clara, CA
Print_ISBN :
0-7803-2584-2
DOI :
10.1109/CICC.1995.518153
