| 摘要 |
An OSD(On Screen Display) interface of a digital broadcasting receiving device is provided to quickly transmit various additional data to a display chip which operates as a host, from a decoder chip, and to solve a deterioration problem of picture quality when the additional data is OSD data. An interrupt is generated for a second chip(301,302). A read command for an external memory is received from the second chip that recognizes the interrupt(303-306). Based on the read command, additional data stored in the external memory is transmitted to the second chip. The additional data is OSD data. When the additional data is transmitted, state information indicative of whether an error exists on a transmitted data block is written on a register. After the second chip reads the state information, the data block is retransmitted or a next data block is transmitted. |
