Terminal based on conditional access technology

摘要

The terminal comprises a tuner, a security chip and a digital television terminal main chip. The tuner is used to receive cable television broadcast data through a cable for cable televisions, and transmit the received cable television broadcast data to the security chip. A key message required by CA is stored in the security chip. The security chip is used to extract stream media of a program needing to be played from the received cable television broadcast data, descramble the stream media according to the stored key message required by the CA, encrypt the descrambled stream media, and transmit the encrypted stream media to the digital television terminal main chip. The digital television terminal main chip is used to decrypt the received encrypted stream media, decode the decrypted stream media to obtain audio and video data, and output the audio and video data.

主权项

1. A terminal based on a Conditional Access (CA) technology, the terminal comprises a tuner, a security chip and a digital television terminal main chip;
the tuner is used to receive cable television broadcast data through a cable for cable televisions, and transmit the received cable television broadcast data to the security chip, a key message required by CA is stored in the security chip; the security chip is used to extract stream media of a program needing to be played from the received cable television broadcast data, descramble the stream media according to the stored key message required by CA, encrypt the descrambled stream media, and transmit the encrypted stream media to the digital television terminal main chip; and the digital television terminal main chip is used to decrypt the received encrypted stream media, decode the decrypted stream media to obtain audio and video data, and output the audio and video data; the security chip comprises at least one group of common transport stream (TS) interfaces; characterized in that the digital television terminal main chip is further used to transmit data to the security chip via the common TS interfaces connected to the security chip, and then, the security chip transmits the data outwards via other data interfaces; or, the security chip transmits the data to the tuner via the common TS interfaces connected to the tuner, and then, the tuner transmits the data outwards.