Exemple #1
0
    def est_loopback_003(self):
        """
        Loopback randomizer/rs_encoder/interleaver/trellis_encoder
	via ds_to_softds to
	viterbi_decoder/deinterleaver/rs_decoder/derandomizer
        """
        src_data = make_transport_stream()
	interleaver_delay = 52
	viterbi_delay = 12
        expected_result = src_data[0:len(src_data)-((interleaver_delay+viterbi_delay)*atsc.ATSC_MPEG_PKT_LENGTH)]

        src = vector_source_ts(src_data)
        rand = atsc.randomizer()
        rs_enc = atsc.rs_encoder()
        inter = atsc.interleaver()
	trellis = atsc.trellis_encoder()
	softds = atsc.ds_to_softds()
	viterbi = atsc.viterbi_decoder()
        deinter = atsc.deinterleaver()
        rs_dec = atsc.rs_decoder()
        derand = atsc.derandomizer()
        dst = vector_sink_ts()
	self.tb.connect(src, rand, rs_enc, inter, trellis, softds, viterbi, deinter, rs_dec, derand, dst)
        self.tb.run ()
        result_data = dst.data ()[((interleaver_delay+viterbi_delay)*atsc.ATSC_MPEG_PKT_LENGTH):len(dst.data())]
        self.assertEqual (expected_result, result_data)
Exemple #2
0
    def est_loopback_001(self):
        """
        Loopback randomizer/rs_encoder to rs_decoder/derandomizer
        """
        src_data = make_transport_stream()
        expected_result = src_data

        src = vector_source_ts(src_data)
        rand = atsc.randomizer()
        rs_enc = atsc.rs_encoder()
        rs_dec = atsc.rs_decoder()
        derand = atsc.derandomizer()
        dst = vector_sink_ts()
        self.tb.connect(src, rand, rs_enc, rs_dec, derand, dst)
        self.tb.run ()
        result_data = dst.data ()
        self.assertEqual (expected_result, result_data)
Exemple #3
0
    def est_loopback_002(self):
        """
        Loopback randomizer/rs_encoder/interleaver to
	deinterleaver/rs_decoder/derandomizer
        """
        src_data = make_transport_stream()
	interleaver_delay = 52
        expected_result = src_data[0:len(src_data)-(interleaver_delay*atsc.ATSC_MPEG_PKT_LENGTH)]

        src = vector_source_ts(src_data)
        rand = atsc.randomizer()
        rs_enc = atsc.rs_encoder()
	inter = atsc.interleaver()
	deinter = atsc.deinterleaver()
        rs_dec = atsc.rs_decoder()
        derand = atsc.derandomizer()
        dst = vector_sink_ts()
        self.tb.connect(src, rand, rs_enc, inter, deinter, rs_dec, derand, dst)
        self.tb.run ()
        result_data = dst.data ()
	result_data = result_data[(interleaver_delay*atsc.ATSC_MPEG_PKT_LENGTH):len(result_data)]
        self.assertEqual (expected_result, result_data)