公开(公告)号：CA1223334A

公开(公告)日：1987-06-23

申请号：CA460688

申请日：1984-08-09

Applicant: IBM

Inventor： TUNG MIN-HSIUNG G ,  YANAGISAWA HIROSHI

IPC: G06T3/40 ,  H04N1/387 ,  H04N1/393

Abstract: METHOD FOR CONVERTING THE NUMBER OF BITS OF INPUT BIT STREAM The number of bits in an input bit stream representing a visual image is reduced or increased to a selected number in response to a given conversion ratio by determining the number of data bits to be inserted to or deleted from said input bit stream in accordance with said given conversion ratio to partition said input bit stream into plural bit groups, the number of which is equal to said number of data bits to be inserted or deleted, by detecting that adjacent two bits in said bit group have the same value, and by inserting one bit to said adjacent two bits or deleting one bit from said adjacent two bits in response to said detection.