| 摘要 |
<p>A teletext decoder comprises a main memory (M2) which includes a raw data buffer (RDB) in rows RD0 to RDn of which teletext data packets and non-teletext "junk" data packets are stored in the order in which they are received, and a reformatting buffer (RB) to rows R0 to R31 of which the data packets stored in the RDB memory are transferred, the data packets in the RB memory being stored in a given numerical sequence. Each of the rows R0 to R31 of the buffer (RB) has a status buffer (SB) byte B0 to B31 respectively, associated with it for indicating whether the corresponding data packet has been received out of its correct given numerical sequence, and thereby being a possible non-teletext "junk" data packet which may be subsequently overwritten by a valid data packet.</p> |
