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Revenue Recognition (Schedule of Disaggregation of Revenue) (Details) $ in Thousands | 3 Months Ended
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Dec. 29, 2023 USD ($) country | Dec. 30, 2022 USD ($)
Revenue from External Customer [Line Items] |  |
Revenue from contract with customer | $ 315,574 | $ 334,921
Revenue from contract with customer, percent | 100.00% | 100.00%
Countries technologies are licensed in | country | 70 |
United States |  |
Revenue from External Customer [Line Items] |  |
Revenue from contract with customer | $ 115,185 | $ 100,262
Revenue from contract with customer, percent | 37.00% | 30.00%
International |  |
Revenue from External Customer [Line Items] |  |
Revenue from contract with customer | $ 200,389 | $ 234,659
Revenue from contract with customer, percent | 63.00% | 70.00%
Licensing |  |
Revenue from External Customer [Line Items] |  |
Revenue from contract with customer | $ 293,767 | $ 308,011
Revenue from contract with customer, percent | 93.00% | 92.00%
Revenue from contract with customer, licensing percent | 100.00% | 100.00%
Products and services |  |
Revenue from External Customer [Line Items] |  |
Revenue from contract with customer | $ 21,807 | $ 26,910
Revenue from contract with customer, percent | 7.00% | 8.00%
Broadcast |  |
Revenue from External Customer [Line Items] |  |
Revenue from contract with customer | $ 112,416 | $ 117,334
Revenue from contract with customer, licensing percent | 38.00% | 38.00%
Mobile |  |
Revenue from External Customer [Line Items] |  |
Revenue from contract with customer | $ 35,287 | $ 64,286
Revenue from contract with customer, licensing percent | 12.00% | 21.00%
CE |  |
Revenue from External Customer [Line Items] |  |
Revenue from contract with customer | $ 53,220 | $ 55,083
Revenue from contract with customer, licensing percent | 18.00% | 18.00%
PC |  |
Revenue from External Customer [Line Items] |  |
Revenue from contract with customer | $ 29,679 | $ 24,286
Revenue from contract with customer, licensing percent | 10.00% | 8.00%
Other |  |
Revenue from External Customer [Line Items] |  |
Revenue from contract with customer | $ 63,165 | $ 47,022
Revenue from contract with customer, licensing percent | 22.00% | 15.00%

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